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Finding the Fourth Proportional to 454.24, 626.56 and 279.68

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Solution

The fourth proportional to 454.24, 626.56 and 279.68 is: 385.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.24 : 626.56 = 279.68 : x
  2. Step 2: Convert to fraction form
    454.24/626.56 = 279.68/x
  3. Step 3: Cross multiply
    454.24x = 626.56 × 279.68
  4. Step 4: Simplify right side
    454.24x = 175,236.30
  5. Step 5: Solve for x
    x = 175,236.30/454.24
  6. Step 6: Final answer
    x = 385.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.