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Finding the Fourth Proportional to 425.27, 637.76 and 136.63

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Solution

The fourth proportional to 425.27, 637.76 and 136.63 is: 204.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.27 : 637.76 = 136.63 : x
  2. Step 2: Convert to fraction form
    425.27/637.76 = 136.63/x
  3. Step 3: Cross multiply
    425.27x = 637.76 × 136.63
  4. Step 4: Simplify right side
    425.27x = 87,136.47
  5. Step 5: Solve for x
    x = 87,136.47/425.27
  6. Step 6: Final answer
    x = 204.90

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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.