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Finding the Fourth Proportional to 551.29, 826.90 and 140.43

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Solution

The fourth proportional to 551.29, 826.90 and 140.43 is: 210.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.29 : 826.90 = 140.43 : x
  2. Step 2: Convert to fraction form
    551.29/826.90 = 140.43/x
  3. Step 3: Cross multiply
    551.29x = 826.90 × 140.43
  4. Step 4: Simplify right side
    551.29x = 116,121.22
  5. Step 5: Solve for x
    x = 116,121.22/551.29
  6. Step 6: Final answer
    x = 210.63

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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.