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Finding the Fourth Proportional to 154.62, 213.39 and 147.18

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Solution

The fourth proportional to 154.62, 213.39 and 147.18 is: 203.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.62 : 213.39 = 147.18 : x
  2. Step 2: Convert to fraction form
    154.62/213.39 = 147.18/x
  3. Step 3: Cross multiply
    154.62x = 213.39 × 147.18
  4. Step 4: Simplify right side
    154.62x = 31,406.74
  5. Step 5: Solve for x
    x = 31,406.74/154.62
  6. Step 6: Final answer
    x = 203.12

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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.