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Finding the Fourth Proportional to 551.10, 826.56 and 140.22

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Solution

The fourth proportional to 551.10, 826.56 and 140.22 is: 210.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.10 : 826.56 = 140.22 : x
  2. Step 2: Convert to fraction form
    551.10/826.56 = 140.22/x
  3. Step 3: Cross multiply
    551.10x = 826.56 × 140.22
  4. Step 4: Simplify right side
    551.10x = 115,900.24
  5. Step 5: Solve for x
    x = 115,900.24/551.10
  6. Step 6: Final answer
    x = 210.31

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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.