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Finding the Fourth Proportional to 177.20, 265.28 and 159.68

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Solution

The fourth proportional to 177.20, 265.28 and 159.68 is: 239.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.20 : 265.28 = 159.68 : x
  2. Step 2: Convert to fraction form
    177.20/265.28 = 159.68/x
  3. Step 3: Cross multiply
    177.20x = 265.28 × 159.68
  4. Step 4: Simplify right side
    177.20x = 42,359.91
  5. Step 5: Solve for x
    x = 42,359.91/177.20
  6. Step 6: Final answer
    x = 239.05

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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.