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Finding the Fourth Proportional to 454.25, 680.29 and 261.47

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Solution

The fourth proportional to 454.25, 680.29 and 261.47 is: 391.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.25 : 680.29 = 261.47 : x
  2. Step 2: Convert to fraction form
    454.25/680.29 = 261.47/x
  3. Step 3: Cross multiply
    454.25x = 680.29 × 261.47
  4. Step 4: Simplify right side
    454.25x = 177,876.08
  5. Step 5: Solve for x
    x = 177,876.08/454.25
  6. Step 6: Final answer
    x = 391.58

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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.