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Finding the Fourth Proportional to 551.39, 826.46 and 258.54

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Solution

The fourth proportional to 551.39, 826.46 and 258.54 is: 387.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.39 : 826.46 = 258.54 : x
  2. Step 2: Convert to fraction form
    551.39/826.46 = 258.54/x
  3. Step 3: Cross multiply
    551.39x = 826.46 × 258.54
  4. Step 4: Simplify right side
    551.39x = 213,672.97
  5. Step 5: Solve for x
    x = 213,672.97/551.39
  6. Step 6: Final answer
    x = 387.52

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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.