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Finding the Fourth Proportional to 240.40, 331.85 and 170.47

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Solution

The fourth proportional to 240.40, 331.85 and 170.47 is: 235.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.40 : 331.85 = 170.47 : x
  2. Step 2: Convert to fraction form
    240.40/331.85 = 170.47/x
  3. Step 3: Cross multiply
    240.40x = 331.85 × 170.47
  4. Step 4: Simplify right side
    240.40x = 56,567.96
  5. Step 5: Solve for x
    x = 56,567.96/240.40
  6. Step 6: Final answer
    x = 235.31

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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.