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Finding the Fourth Proportional to 454.16, 626.85 and 279.47

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Solution

The fourth proportional to 454.16, 626.85 and 279.47 is: 385.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.16 : 626.85 = 279.47 : x
  2. Step 2: Convert to fraction form
    454.16/626.85 = 279.47/x
  3. Step 3: Cross multiply
    454.16x = 626.85 × 279.47
  4. Step 4: Simplify right side
    454.16x = 175,182.64
  5. Step 5: Solve for x
    x = 175,182.64/454.16
  6. Step 6: Final answer
    x = 385.73

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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.