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Finding the Fourth Proportional to 275.20, 412.98 and 159.88

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Solution

The fourth proportional to 275.20, 412.98 and 159.88 is: 239.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.20 : 412.98 = 159.88 : x
  2. Step 2: Convert to fraction form
    275.20/412.98 = 159.88/x
  3. Step 3: Cross multiply
    275.20x = 412.98 × 159.88
  4. Step 4: Simplify right side
    275.20x = 66,027.24
  5. Step 5: Solve for x
    x = 66,027.24/275.20
  6. Step 6: Final answer
    x = 239.92

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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.