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Finding the Fourth Proportional to 232.58, 320.80 and 149.55

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Solution

The fourth proportional to 232.58, 320.80 and 149.55 is: 206.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.58 : 320.80 = 149.55 : x
  2. Step 2: Convert to fraction form
    232.58/320.80 = 149.55/x
  3. Step 3: Cross multiply
    232.58x = 320.80 × 149.55
  4. Step 4: Simplify right side
    232.58x = 47,975.64
  5. Step 5: Solve for x
    x = 47,975.64/232.58
  6. Step 6: Final answer
    x = 206.28

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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.