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Finding the Fourth Proportional to 240.18, 330.71 and 215.88

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Solution

The fourth proportional to 240.18, 330.71 and 215.88 is: 297.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.18 : 330.71 = 215.88 : x
  2. Step 2: Convert to fraction form
    240.18/330.71 = 215.88/x
  3. Step 3: Cross multiply
    240.18x = 330.71 × 215.88
  4. Step 4: Simplify right side
    240.18x = 71,393.67
  5. Step 5: Solve for x
    x = 71,393.67/240.18
  6. Step 6: Final answer
    x = 297.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.