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Finding the Fourth Proportional to 442,755, 664,197.30 and 143,136

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Solution

The fourth proportional to 442,755, 664,197.30 and 143,136 is: 214,724.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,755 : 664,197.30 = 143,136 : x
  2. Step 2: Convert to fraction form
    442,755/664,197.30 = 143,136/x
  3. Step 3: Cross multiply
    442,755x = 664,197.30 × 143,136
  4. Step 4: Simplify right side
    442,755x = 95,070,544,732.80
  5. Step 5: Solve for x
    x = 95,070,544,732.80/442,755
  6. Step 6: Final answer
    x = 214,724.95

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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.