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Finding the Fourth Proportional to 240.30, 331.70 and 156.29

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Solution

The fourth proportional to 240.30, 331.70 and 156.29 is: 215.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.30 : 331.70 = 156.29 : x
  2. Step 2: Convert to fraction form
    240.30/331.70 = 156.29/x
  3. Step 3: Cross multiply
    240.30x = 331.70 × 156.29
  4. Step 4: Simplify right side
    240.30x = 51,838.95
  5. Step 5: Solve for x
    x = 51,838.95/240.30
  6. Step 6: Final answer
    x = 215.73

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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.