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Finding the Fourth Proportional to 424.41, 636.59 and 131.91

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Solution

The fourth proportional to 424.41, 636.59 and 131.91 is: 197.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.41 : 636.59 = 131.91 : x
  2. Step 2: Convert to fraction form
    424.41/636.59 = 131.91/x
  3. Step 3: Cross multiply
    424.41x = 636.59 × 131.91
  4. Step 4: Simplify right side
    424.41x = 83,970.20
  5. Step 5: Solve for x
    x = 83,970.20/424.41
  6. Step 6: Final answer
    x = 197.85

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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.