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Finding the Fourth Proportional to 262.32, 393.28 and 117.92

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Solution

The fourth proportional to 262.32, 393.28 and 117.92 is: 176.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.32 : 393.28 = 117.92 : x
  2. Step 2: Convert to fraction form
    262.32/393.28 = 117.92/x
  3. Step 3: Cross multiply
    262.32x = 393.28 × 117.92
  4. Step 4: Simplify right side
    262.32x = 46,375.58
  5. Step 5: Solve for x
    x = 46,375.58/262.32
  6. Step 6: Final answer
    x = 176.79

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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.