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Finding the Fourth Proportional to 454.12, 626.66 and 279.46

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Solution

The fourth proportional to 454.12, 626.66 and 279.46 is: 385.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.12 : 626.66 = 279.46 : x
  2. Step 2: Convert to fraction form
    454.12/626.66 = 279.46/x
  3. Step 3: Cross multiply
    454.12x = 626.66 × 279.46
  4. Step 4: Simplify right side
    454.12x = 175,126.40
  5. Step 5: Solve for x
    x = 175,126.40/454.12
  6. Step 6: Final answer
    x = 385.64

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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.