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Finding the Fourth Proportional to 155.91, 232.60 and 149.79

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Solution

The fourth proportional to 155.91, 232.60 and 149.79 is: 223.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.91 : 232.60 = 149.79 : x
  2. Step 2: Convert to fraction form
    155.91/232.60 = 149.79/x
  3. Step 3: Cross multiply
    155.91x = 232.60 × 149.79
  4. Step 4: Simplify right side
    155.91x = 34,840.78
  5. Step 5: Solve for x
    x = 34,840.78/155.91
  6. Step 6: Final answer
    x = 223.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.