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Finding the Fourth Proportional to 551.57, 826.49 and 414.47

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Solution

The fourth proportional to 551.57, 826.49 and 414.47 is: 621.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.57 : 826.49 = 414.47 : x
  2. Step 2: Convert to fraction form
    551.57/826.49 = 414.47/x
  3. Step 3: Cross multiply
    551.57x = 826.49 × 414.47
  4. Step 4: Simplify right side
    551.57x = 342,549.11
  5. Step 5: Solve for x
    x = 342,549.11/551.57
  6. Step 6: Final answer
    x = 621.05

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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.