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Finding the Fourth Proportional to 424,809.10, 637,121.20 and 140,432.46

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Solution

The fourth proportional to 424,809.10, 637,121.20 and 140,432.46 is: 210,618.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,809.10 : 637,121.20 = 140,432.46 : x
  2. Step 2: Convert to fraction form
    424,809.10/637,121.20 = 140,432.46/x
  3. Step 3: Cross multiply
    424,809.10x = 637,121.20 × 140,432.46
  4. Step 4: Simplify right side
    424,809.10x = 89,472,497,434.15
  5. Step 5: Solve for x
    x = 89,472,497,434.15/424,809.10
  6. Step 6: Final answer
    x = 210,618.13

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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.