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Finding the Fourth Proportional to 551.19, 826.21 and 185.85

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Solution

The fourth proportional to 551.19, 826.21 and 185.85 is: 278.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.19 : 826.21 = 185.85 : x
  2. Step 2: Convert to fraction form
    551.19/826.21 = 185.85/x
  3. Step 3: Cross multiply
    551.19x = 826.21 × 185.85
  4. Step 4: Simplify right side
    551.19x = 153,551.13
  5. Step 5: Solve for x
    x = 153,551.13/551.19
  6. Step 6: Final answer
    x = 278.58

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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.