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Finding the Fourth Proportional to 551.17, 826.71 and 166.42

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Solution

The fourth proportional to 551.17, 826.71 and 166.42 is: 249.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.17 : 826.71 = 166.42 : x
  2. Step 2: Convert to fraction form
    551.17/826.71 = 166.42/x
  3. Step 3: Cross multiply
    551.17x = 826.71 × 166.42
  4. Step 4: Simplify right side
    551.17x = 137,581.08
  5. Step 5: Solve for x
    x = 137,581.08/551.17
  6. Step 6: Final answer
    x = 249.62

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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.