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Finding the Fourth Proportional to 424,211.25, 636,155.28 and 187,424.76

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Solution

The fourth proportional to 424,211.25, 636,155.28 and 187,424.76 is: 281,065.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,211.25 : 636,155.28 = 187,424.76 : x
  2. Step 2: Convert to fraction form
    424,211.25/636,155.28 = 187,424.76/x
  3. Step 3: Cross multiply
    424,211.25x = 636,155.28 × 187,424.76
  4. Step 4: Simplify right side
    424,211.25x = 119,231,250,676.73
  5. Step 5: Solve for x
    x = 119,231,250,676.73/424,211.25
  6. Step 6: Final answer
    x = 281,065.74

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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.