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Finding the Fourth Proportional to 424.88, 637.40 and 132.36

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Solution

The fourth proportional to 424.88, 637.40 and 132.36 is: 198.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.88 : 637.40 = 132.36 : x
  2. Step 2: Convert to fraction form
    424.88/637.40 = 132.36/x
  3. Step 3: Cross multiply
    424.88x = 637.40 × 132.36
  4. Step 4: Simplify right side
    424.88x = 84,366.26
  5. Step 5: Solve for x
    x = 84,366.26/424.88
  6. Step 6: Final answer
    x = 198.56

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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.