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Finding the Fourth Proportional to 239.76, 359.32 and 117.92

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Solution

The fourth proportional to 239.76, 359.32 and 117.92 is: 176.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.76 : 359.32 = 117.92 : x
  2. Step 2: Convert to fraction form
    239.76/359.32 = 117.92/x
  3. Step 3: Cross multiply
    239.76x = 359.32 × 117.92
  4. Step 4: Simplify right side
    239.76x = 42,371.01
  5. Step 5: Solve for x
    x = 42,371.01/239.76
  6. Step 6: Final answer
    x = 176.72

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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.