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Finding the Fourth Proportional to 232.45, 320.72 and 139.15

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Solution

The fourth proportional to 232.45, 320.72 and 139.15 is: 191.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.45 : 320.72 = 139.15 : x
  2. Step 2: Convert to fraction form
    232.45/320.72 = 139.15/x
  3. Step 3: Cross multiply
    232.45x = 320.72 × 139.15
  4. Step 4: Simplify right side
    232.45x = 44,627.89
  5. Step 5: Solve for x
    x = 44,627.89/232.45
  6. Step 6: Final answer
    x = 191.99

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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.