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Finding the Fourth Proportional to 254.76, 381.92 and 98.49

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Solution

The fourth proportional to 254.76, 381.92 and 98.49 is: 147.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.76 : 381.92 = 98.49 : x
  2. Step 2: Convert to fraction form
    254.76/381.92 = 98.49/x
  3. Step 3: Cross multiply
    254.76x = 381.92 × 98.49
  4. Step 4: Simplify right side
    254.76x = 37,614.81
  5. Step 5: Solve for x
    x = 37,614.81/254.76
  6. Step 6: Final answer
    x = 147.65

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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.