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Finding the Fourth Proportional to 258.24, 387.12 and 150.12

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Solution

The fourth proportional to 258.24, 387.12 and 150.12 is: 225.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.24 : 387.12 = 150.12 : x
  2. Step 2: Convert to fraction form
    258.24/387.12 = 150.12/x
  3. Step 3: Cross multiply
    258.24x = 387.12 × 150.12
  4. Step 4: Simplify right side
    258.24x = 58,114.45
  5. Step 5: Solve for x
    x = 58,114.45/258.24
  6. Step 6: Final answer
    x = 225.04

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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.