Home / 1,211,458,510.80-1,817,187,766.20-393,653,480.40

Finding the Fourth Proportional to 1,211,458,510.80, 1,817,187,766.20 and 393,653,480.40

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Solution

The fourth proportional to 1,211,458,510.80, 1,817,187,766.20 and 393,653,480.40 is: 590,480,220.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,458,510.80 : 1,817,187,766.20 = 393,653,480.40 : x
  2. Step 2: Convert to fraction form
    1,211,458,510.80/1,817,187,766.20 = 393,653,480.40/x
  3. Step 3: Cross multiply
    1,211,458,510.80x = 1,817,187,766.20 × 393,653,480.40
  4. Step 4: Simplify right side
    1,211,458,510.80x = 715,342,288,704,931,456
  5. Step 5: Solve for x
    x = 715,342,288,704,931,456/1,211,458,510.80
  6. Step 6: Final answer
    x = 590,480,220.60

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Half scale
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Double scale
Find fourth proportional to 1,211,458,511.80, 1,817,187,767.70 and 393,653,481.40
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.