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Finding the Fourth Proportional to 542,665.40, 813,998.10 and 437,689.40

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Solution

The fourth proportional to 542,665.40, 813,998.10 and 437,689.40 is: 656,534.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,665.40 : 813,998.10 = 437,689.40 : x
  2. Step 2: Convert to fraction form
    542,665.40/813,998.10 = 437,689.40/x
  3. Step 3: Cross multiply
    542,665.40x = 813,998.10 × 437,689.40
  4. Step 4: Simplify right side
    542,665.40x = 356,278,339,990.14
  5. Step 5: Solve for x
    x = 356,278,339,990.14/542,665.40
  6. Step 6: Final answer
    x = 656,534.10

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