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Finding the Fourth Proportional to 154.76, 231.17 and 130.48

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Solution

The fourth proportional to 154.76, 231.17 and 130.48 is: 194.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.76 : 231.17 = 130.48 : x
  2. Step 2: Convert to fraction form
    154.76/231.17 = 130.48/x
  3. Step 3: Cross multiply
    154.76x = 231.17 × 130.48
  4. Step 4: Simplify right side
    154.76x = 30,163.06
  5. Step 5: Solve for x
    x = 30,163.06/154.76
  6. Step 6: Final answer
    x = 194.90

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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.