Home / 721,949.52-996,278.40-399,652.80

Finding the Fourth Proportional to 721,949.52, 996,278.40 and 399,652.80

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Solution

The fourth proportional to 721,949.52, 996,278.40 and 399,652.80 is: 551,514.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,949.52 : 996,278.40 = 399,652.80 : x
  2. Step 2: Convert to fraction form
    721,949.52/996,278.40 = 399,652.80/x
  3. Step 3: Cross multiply
    721,949.52x = 996,278.40 × 399,652.80
  4. Step 4: Simplify right side
    721,949.52x = 398,165,452,139.52
  5. Step 5: Solve for x
    x = 398,165,452,139.52/721,949.52
  6. Step 6: Final answer
    x = 551,514.26

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.