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Finding the Fourth Proportional to 238.78, 358.06 and 101.75

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Solution

The fourth proportional to 238.78, 358.06 and 101.75 is: 152.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.78 : 358.06 = 101.75 : x
  2. Step 2: Convert to fraction form
    238.78/358.06 = 101.75/x
  3. Step 3: Cross multiply
    238.78x = 358.06 × 101.75
  4. Step 4: Simplify right side
    238.78x = 36,432.61
  5. Step 5: Solve for x
    x = 36,432.61/238.78
  6. Step 6: Final answer
    x = 152.58

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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.