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Finding the Fourth Proportional to 232.45, 348.72 and 78.39

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Solution

The fourth proportional to 232.45, 348.72 and 78.39 is: 117.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.45 : 348.72 = 78.39 : x
  2. Step 2: Convert to fraction form
    232.45/348.72 = 78.39/x
  3. Step 3: Cross multiply
    232.45x = 348.72 × 78.39
  4. Step 4: Simplify right side
    232.45x = 27,336.16
  5. Step 5: Solve for x
    x = 27,336.16/232.45
  6. Step 6: Final answer
    x = 117.60

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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.