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Finding the Fourth Proportional to 274.43, 410.67 and 258.85

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Solution

The fourth proportional to 274.43, 410.67 and 258.85 is: 387.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.43 : 410.67 = 258.85 : x
  2. Step 2: Convert to fraction form
    274.43/410.67 = 258.85/x
  3. Step 3: Cross multiply
    274.43x = 410.67 × 258.85
  4. Step 4: Simplify right side
    274.43x = 106,301.93
  5. Step 5: Solve for x
    x = 106,301.93/274.43
  6. Step 6: Final answer
    x = 387.36

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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.