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Finding the Fourth Proportional to 248.52, 372.66 and 86.16

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Solution

The fourth proportional to 248.52, 372.66 and 86.16 is: 129.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.52 : 372.66 = 86.16 : x
  2. Step 2: Convert to fraction form
    248.52/372.66 = 86.16/x
  3. Step 3: Cross multiply
    248.52x = 372.66 × 86.16
  4. Step 4: Simplify right side
    248.52x = 32,108.39
  5. Step 5: Solve for x
    x = 32,108.39/248.52
  6. Step 6: Final answer
    x = 129.20

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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.