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Finding the Fourth Proportional to 232.98, 321.37 and 139.67

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Solution

The fourth proportional to 232.98, 321.37 and 139.67 is: 192.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.98 : 321.37 = 139.67 : x
  2. Step 2: Convert to fraction form
    232.98/321.37 = 139.67/x
  3. Step 3: Cross multiply
    232.98x = 321.37 × 139.67
  4. Step 4: Simplify right side
    232.98x = 44,885.75
  5. Step 5: Solve for x
    x = 44,885.75/232.98
  6. Step 6: Final answer
    x = 192.66

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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.