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Finding the Fourth Proportional to 442.76, 664.15 and 118.13

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Solution

The fourth proportional to 442.76, 664.15 and 118.13 is: 177.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.76 : 664.15 = 118.13 : x
  2. Step 2: Convert to fraction form
    442.76/664.15 = 118.13/x
  3. Step 3: Cross multiply
    442.76x = 664.15 × 118.13
  4. Step 4: Simplify right side
    442.76x = 78,456.04
  5. Step 5: Solve for x
    x = 78,456.04/442.76
  6. Step 6: Final answer
    x = 177.20

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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.