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Finding the Fourth Proportional to 721,937.15, 996,281.13 and 399,652.62

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Solution

The fourth proportional to 721,937.15, 996,281.13 and 399,652.62 is: 551,524.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,937.15 : 996,281.13 = 399,652.62 : x
  2. Step 2: Convert to fraction form
    721,937.15/996,281.13 = 399,652.62/x
  3. Step 3: Cross multiply
    721,937.15x = 996,281.13 × 399,652.62
  4. Step 4: Simplify right side
    721,937.15x = 398,166,363,861.06
  5. Step 5: Solve for x
    x = 398,166,363,861.06/721,937.15
  6. Step 6: Final answer
    x = 551,524.97

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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.