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Finding the Fourth Proportional to 424.50, 636.70 and 116.38

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Solution

The fourth proportional to 424.50, 636.70 and 116.38 is: 174.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.50 : 636.70 = 116.38 : x
  2. Step 2: Convert to fraction form
    424.50/636.70 = 116.38/x
  3. Step 3: Cross multiply
    424.50x = 636.70 × 116.38
  4. Step 4: Simplify right side
    424.50x = 74,099.15
  5. Step 5: Solve for x
    x = 74,099.15/424.50
  6. Step 6: Final answer
    x = 174.56

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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.