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Finding the Fourth Proportional to 254.32, 381.72 and 158.20

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Solution

The fourth proportional to 254.32, 381.72 and 158.20 is: 237.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.32 : 381.72 = 158.20 : x
  2. Step 2: Convert to fraction form
    254.32/381.72 = 158.20/x
  3. Step 3: Cross multiply
    254.32x = 381.72 × 158.20
  4. Step 4: Simplify right side
    254.32x = 60,388.10
  5. Step 5: Solve for x
    x = 60,388.10/254.32
  6. Step 6: Final answer
    x = 237.45

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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.