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Finding the Fourth Proportional to 258.03, 387.03 and 113.74

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Solution

The fourth proportional to 258.03, 387.03 and 113.74 is: 170.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.03 : 387.03 = 113.74 : x
  2. Step 2: Convert to fraction form
    258.03/387.03 = 113.74/x
  3. Step 3: Cross multiply
    258.03x = 387.03 × 113.74
  4. Step 4: Simplify right side
    258.03x = 44,020.79
  5. Step 5: Solve for x
    x = 44,020.79/258.03
  6. Step 6: Final answer
    x = 170.60

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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.