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Finding the Fourth Proportional to 240.31, 360.05 and 171.49

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Solution

The fourth proportional to 240.31, 360.05 and 171.49 is: 256.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.31 : 360.05 = 171.49 : x
  2. Step 2: Convert to fraction form
    240.31/360.05 = 171.49/x
  3. Step 3: Cross multiply
    240.31x = 360.05 × 171.49
  4. Step 4: Simplify right side
    240.31x = 61,744.97
  5. Step 5: Solve for x
    x = 61,744.97/240.31
  6. Step 6: Final answer
    x = 256.94

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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.