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Finding the Fourth Proportional to 258.20, 387.48 and 114.02

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Solution

The fourth proportional to 258.20, 387.48 and 114.02 is: 171.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.20 : 387.48 = 114.02 : x
  2. Step 2: Convert to fraction form
    258.20/387.48 = 114.02/x
  3. Step 3: Cross multiply
    258.20x = 387.48 × 114.02
  4. Step 4: Simplify right side
    258.20x = 44,180.47
  5. Step 5: Solve for x
    x = 44,180.47/258.20
  6. Step 6: Final answer
    x = 171.11

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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.