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Finding the Fourth Proportional to 239.28, 358.48 and 148.08

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Solution

The fourth proportional to 239.28, 358.48 and 148.08 is: 221.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.28 : 358.48 = 148.08 : x
  2. Step 2: Convert to fraction form
    239.28/358.48 = 148.08/x
  3. Step 3: Cross multiply
    239.28x = 358.48 × 148.08
  4. Step 4: Simplify right side
    239.28x = 53,083.72
  5. Step 5: Solve for x
    x = 53,083.72/239.28
  6. Step 6: Final answer
    x = 221.85

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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.