Home / 721,377.55-995,516.90-399,110.55

Finding the Fourth Proportional to 721,377.55, 995,516.90 and 399,110.55

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Solution

The fourth proportional to 721,377.55, 995,516.90 and 399,110.55 is: 550,781.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,377.55 : 995,516.90 = 399,110.55 : x
  2. Step 2: Convert to fraction form
    721,377.55/995,516.90 = 399,110.55/x
  3. Step 3: Cross multiply
    721,377.55x = 995,516.90 × 399,110.55
  4. Step 4: Simplify right side
    721,377.55x = 397,321,297,493.30
  5. Step 5: Solve for x
    x = 397,321,297,493.30/721,377.55
  6. Step 6: Final answer
    x = 550,781.35

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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.