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Finding the Fourth Proportional to 206.08, 284.52 and 154.72

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Solution

The fourth proportional to 206.08, 284.52 and 154.72 is: 213.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.08 : 284.52 = 154.72 : x
  2. Step 2: Convert to fraction form
    206.08/284.52 = 154.72/x
  3. Step 3: Cross multiply
    206.08x = 284.52 × 154.72
  4. Step 4: Simplify right side
    206.08x = 44,020.93
  5. Step 5: Solve for x
    x = 44,020.93/206.08
  6. Step 6: Final answer
    x = 213.61

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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.