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Finding the Fourth Proportional to 424,280.73, 636,839.33 and 311,644.74

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Solution

The fourth proportional to 424,280.73, 636,839.33 and 311,644.74 is: 467,774.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,280.73 : 636,839.33 = 311,644.74 : x
  2. Step 2: Convert to fraction form
    424,280.73/636,839.33 = 311,644.74/x
  3. Step 3: Cross multiply
    424,280.73x = 636,839.33 × 311,644.74
  4. Step 4: Simplify right side
    424,280.73x = 198,467,625,861.40
  5. Step 5: Solve for x
    x = 198,467,625,861.40/424,280.73
  6. Step 6: Final answer
    x = 467,774.31

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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.