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Finding the Fourth Proportional to 248.40, 372.44 and 132.72

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Solution

The fourth proportional to 248.40, 372.44 and 132.72 is: 198.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.40 : 372.44 = 132.72 : x
  2. Step 2: Convert to fraction form
    248.40/372.44 = 132.72/x
  3. Step 3: Cross multiply
    248.40x = 372.44 × 132.72
  4. Step 4: Simplify right side
    248.40x = 49,430.24
  5. Step 5: Solve for x
    x = 49,430.24/248.40
  6. Step 6: Final answer
    x = 198.99

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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.