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Finding the Fourth Proportional to 454.32, 626.87 and 279.57

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Solution

The fourth proportional to 454.32, 626.87 and 279.57 is: 385.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.32 : 626.87 = 279.57 : x
  2. Step 2: Convert to fraction form
    454.32/626.87 = 279.57/x
  3. Step 3: Cross multiply
    454.32x = 626.87 × 279.57
  4. Step 4: Simplify right side
    454.32x = 175,252.65
  5. Step 5: Solve for x
    x = 175,252.65/454.32
  6. Step 6: Final answer
    x = 385.75

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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.