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Finding the Fourth Proportional to 456.84, 685.08 and 132.20

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Solution

The fourth proportional to 456.84, 685.08 and 132.20 is: 198.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.84 : 685.08 = 132.20 : x
  2. Step 2: Convert to fraction form
    456.84/685.08 = 132.20/x
  3. Step 3: Cross multiply
    456.84x = 685.08 × 132.20
  4. Step 4: Simplify right side
    456.84x = 90,567.58
  5. Step 5: Solve for x
    x = 90,567.58/456.84
  6. Step 6: Final answer
    x = 198.25

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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.