Home / 1,328,724,139.80-1,993,086,209.70-408,480,904.20

Finding the Fourth Proportional to 1,328,724,139.80, 1,993,086,209.70 and 408,480,904.20

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Solution

The fourth proportional to 1,328,724,139.80, 1,993,086,209.70 and 408,480,904.20 is: 612,721,356.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,724,139.80 : 1,993,086,209.70 = 408,480,904.20 : x
  2. Step 2: Convert to fraction form
    1,328,724,139.80/1,993,086,209.70 = 408,480,904.20/x
  3. Step 3: Cross multiply
    1,328,724,139.80x = 1,993,086,209.70 × 408,480,904.20
  4. Step 4: Simplify right side
    1,328,724,139.80x = 814,137,657,086,806,784
  5. Step 5: Solve for x
    x = 814,137,657,086,806,784/1,328,724,139.80
  6. Step 6: Final answer
    x = 612,721,356.30

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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.