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Finding the Fourth Proportional to 424,402.90, 636,469.34 and 140,040.45

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Solution

The fourth proportional to 424,402.90, 636,469.34 and 140,040.45 is: 210,016.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,402.90 : 636,469.34 = 140,040.45 : x
  2. Step 2: Convert to fraction form
    424,402.90/636,469.34 = 140,040.45/x
  3. Step 3: Cross multiply
    424,402.90x = 636,469.34 × 140,040.45
  4. Step 4: Simplify right side
    424,402.90x = 89,131,452,084.60
  5. Step 5: Solve for x
    x = 89,131,452,084.60/424,402.90
  6. Step 6: Final answer
    x = 210,016.13

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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.