Home / 724,385.80-1,086,578.70-472,443.40

Finding the Fourth Proportional to 724,385.80, 1,086,578.70 and 472,443.40

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Solution

The fourth proportional to 724,385.80, 1,086,578.70 and 472,443.40 is: 708,665.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,385.80 : 1,086,578.70 = 472,443.40 : x
  2. Step 2: Convert to fraction form
    724,385.80/1,086,578.70 = 472,443.40/x
  3. Step 3: Cross multiply
    724,385.80x = 1,086,578.70 × 472,443.40
  4. Step 4: Simplify right side
    724,385.80x = 513,346,935,395.58
  5. Step 5: Solve for x
    x = 513,346,935,395.58/724,385.80
  6. Step 6: Final answer
    x = 708,665.10

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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.