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Finding the Fourth Proportional to 551.54, 826.99 and 378.41

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Solution

The fourth proportional to 551.54, 826.99 and 378.41 is: 567.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.54 : 826.99 = 378.41 : x
  2. Step 2: Convert to fraction form
    551.54/826.99 = 378.41/x
  3. Step 3: Cross multiply
    551.54x = 826.99 × 378.41
  4. Step 4: Simplify right side
    551.54x = 312,938.33
  5. Step 5: Solve for x
    x = 312,938.33/551.54
  6. Step 6: Final answer
    x = 567.39

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Double scale
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Similar ratio
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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.