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Finding the Fourth Proportional to 154.43, 231.58 and 55.57

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Solution

The fourth proportional to 154.43, 231.58 and 55.57 is: 83.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.43 : 231.58 = 55.57 : x
  2. Step 2: Convert to fraction form
    154.43/231.58 = 55.57/x
  3. Step 3: Cross multiply
    154.43x = 231.58 × 55.57
  4. Step 4: Simplify right side
    154.43x = 12,868.62
  5. Step 5: Solve for x
    x = 12,868.62/154.43
  6. Step 6: Final answer
    x = 83.33

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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.