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Finding the Fourth Proportional to 154.18, 231.28 and 45.97

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Solution

The fourth proportional to 154.18, 231.28 and 45.97 is: 68.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.18 : 231.28 = 45.97 : x
  2. Step 2: Convert to fraction form
    154.18/231.28 = 45.97/x
  3. Step 3: Cross multiply
    154.18x = 231.28 × 45.97
  4. Step 4: Simplify right side
    154.18x = 10,631.94
  5. Step 5: Solve for x
    x = 10,631.94/154.18
  6. Step 6: Final answer
    x = 68.96

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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.