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Finding the Fourth Proportional to 240.14, 331.31 and 152.79

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Solution

The fourth proportional to 240.14, 331.31 and 152.79 is: 210.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.14 : 331.31 = 152.79 : x
  2. Step 2: Convert to fraction form
    240.14/331.31 = 152.79/x
  3. Step 3: Cross multiply
    240.14x = 331.31 × 152.79
  4. Step 4: Simplify right side
    240.14x = 50,620.09
  5. Step 5: Solve for x
    x = 50,620.09/240.14
  6. Step 6: Final answer
    x = 210.80

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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.