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Finding the Fourth Proportional to 454.39, 626.88 and 279.43

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Solution

The fourth proportional to 454.39, 626.88 and 279.43 is: 385.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.39 : 626.88 = 279.43 : x
  2. Step 2: Convert to fraction form
    454.39/626.88 = 279.43/x
  3. Step 3: Cross multiply
    454.39x = 626.88 × 279.43
  4. Step 4: Simplify right side
    454.39x = 175,169.08
  5. Step 5: Solve for x
    x = 175,169.08/454.39
  6. Step 6: Final answer
    x = 385.50

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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.