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Finding the Fourth Proportional to 454.17, 680.61 and 258.77

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Solution

The fourth proportional to 454.17, 680.61 and 258.77 is: 387.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.17 : 680.61 = 258.77 : x
  2. Step 2: Convert to fraction form
    454.17/680.61 = 258.77/x
  3. Step 3: Cross multiply
    454.17x = 680.61 × 258.77
  4. Step 4: Simplify right side
    454.17x = 176,119.95
  5. Step 5: Solve for x
    x = 176,119.95/454.17
  6. Step 6: Final answer
    x = 387.78

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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.