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Finding the Fourth Proportional to 232.30, 320.61 and 139.06

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Solution

The fourth proportional to 232.30, 320.61 and 139.06 is: 191.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.30 : 320.61 = 139.06 : x
  2. Step 2: Convert to fraction form
    232.30/320.61 = 139.06/x
  3. Step 3: Cross multiply
    232.30x = 320.61 × 139.06
  4. Step 4: Simplify right side
    232.30x = 44,584.03
  5. Step 5: Solve for x
    x = 44,584.03/232.30
  6. Step 6: Final answer
    x = 191.92

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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.