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Finding the Fourth Proportional to 248.76, 372.78 and 133.28

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Solution

The fourth proportional to 248.76, 372.78 and 133.28 is: 199.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.76 : 372.78 = 133.28 : x
  2. Step 2: Convert to fraction form
    248.76/372.78 = 133.28/x
  3. Step 3: Cross multiply
    248.76x = 372.78 × 133.28
  4. Step 4: Simplify right side
    248.76x = 49,684.12
  5. Step 5: Solve for x
    x = 49,684.12/248.76
  6. Step 6: Final answer
    x = 199.73

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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.