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Finding the Fourth Proportional to 154.94, 231.18 and 151.28

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Solution

The fourth proportional to 154.94, 231.18 and 151.28 is: 225.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.94 : 231.18 = 151.28 : x
  2. Step 2: Convert to fraction form
    154.94/231.18 = 151.28/x
  3. Step 3: Cross multiply
    154.94x = 231.18 × 151.28
  4. Step 4: Simplify right side
    154.94x = 34,972.91
  5. Step 5: Solve for x
    x = 34,972.91/154.94
  6. Step 6: Final answer
    x = 225.72

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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.