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Finding the Fourth Proportional to 721,617.66, 996,654.78 and 491,778.54

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Solution

The fourth proportional to 721,617.66, 996,654.78 and 491,778.54 is: 679,214.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,617.66 : 996,654.78 = 491,778.54 : x
  2. Step 2: Convert to fraction form
    721,617.66/996,654.78 = 491,778.54/x
  3. Step 3: Cross multiply
    721,617.66x = 996,654.78 × 491,778.54
  4. Step 4: Simplify right side
    721,617.66x = 490,133,432,592.42
  5. Step 5: Solve for x
    x = 490,133,432,592.42/721,617.66
  6. Step 6: Final answer
    x = 679,214.85

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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.