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Finding the Fourth Proportional to 456.90, 685.36 and 132.28

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Solution

The fourth proportional to 456.90, 685.36 and 132.28 is: 198.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.90 : 685.36 = 132.28 : x
  2. Step 2: Convert to fraction form
    456.90/685.36 = 132.28/x
  3. Step 3: Cross multiply
    456.90x = 685.36 × 132.28
  4. Step 4: Simplify right side
    456.90x = 90,657.38
  5. Step 5: Solve for x
    x = 90,657.38/456.90
  6. Step 6: Final answer
    x = 198.42

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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.