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Finding the Fourth Proportional to 238.85, 358.28 and 76.53

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Solution

The fourth proportional to 238.85, 358.28 and 76.53 is: 114.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.85 : 358.28 = 76.53 : x
  2. Step 2: Convert to fraction form
    238.85/358.28 = 76.53/x
  3. Step 3: Cross multiply
    238.85x = 358.28 × 76.53
  4. Step 4: Simplify right side
    238.85x = 27,420.85
  5. Step 5: Solve for x
    x = 27,420.85/238.85
  6. Step 6: Final answer
    x = 114.80

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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.