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Finding the Fourth Proportional to 424,415, 636,487.25 and 140,052.55

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Solution

The fourth proportional to 424,415, 636,487.25 and 140,052.55 is: 210,034.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,415 : 636,487.25 = 140,052.55 : x
  2. Step 2: Convert to fraction form
    424,415/636,487.25 = 140,052.55/x
  3. Step 3: Cross multiply
    424,415x = 636,487.25 × 140,052.55
  4. Step 4: Simplify right side
    424,415x = 89,141,662,404.99
  5. Step 5: Solve for x
    x = 89,141,662,404.99/424,415
  6. Step 6: Final answer
    x = 210,034.19

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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.