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Finding the Fourth Proportional to 721,755.32, 995,934.96 and 415,931.92

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Solution

The fourth proportional to 721,755.32, 995,934.96 and 415,931.92 is: 573,935.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,755.32 : 995,934.96 = 415,931.92 : x
  2. Step 2: Convert to fraction form
    721,755.32/995,934.96 = 415,931.92/x
  3. Step 3: Cross multiply
    721,755.32x = 995,934.96 × 415,931.92
  4. Step 4: Simplify right side
    721,755.32x = 414,241,137,618.09
  5. Step 5: Solve for x
    x = 414,241,137,618.09/721,755.32
  6. Step 6: Final answer
    x = 573,935.69

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.