Home / 721,920.02-996,237.57-399,623.30

Finding the Fourth Proportional to 721,920.02, 996,237.57 and 399,623.30

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Solution

The fourth proportional to 721,920.02, 996,237.57 and 399,623.30 is: 551,473.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,920.02 : 996,237.57 = 399,623.30 : x
  2. Step 2: Convert to fraction form
    721,920.02/996,237.57 = 399,623.30/x
  3. Step 3: Cross multiply
    721,920.02x = 996,237.57 × 399,623.30
  4. Step 4: Simplify right side
    721,920.02x = 398,119,745,307.38
  5. Step 5: Solve for x
    x = 398,119,745,307.38/721,920.02
  6. Step 6: Final answer
    x = 551,473.48

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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.