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Finding the Fourth Proportional to 869,137.80, 1,303,706.70 and 550,273.20

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Solution

The fourth proportional to 869,137.80, 1,303,706.70 and 550,273.20 is: 825,409.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,137.80 : 1,303,706.70 = 550,273.20 : x
  2. Step 2: Convert to fraction form
    869,137.80/1,303,706.70 = 550,273.20/x
  3. Step 3: Cross multiply
    869,137.80x = 1,303,706.70 × 550,273.20
  4. Step 4: Simplify right side
    869,137.80x = 717,394,857,670.44
  5. Step 5: Solve for x
    x = 717,394,857,670.44/869,137.80
  6. Step 6: Final answer
    x = 825,409.80

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Double scale
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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.