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Finding the Fourth Proportional to 453.62, 626.02 and 257.15

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Solution

The fourth proportional to 453.62, 626.02 and 257.15 is: 354.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.62 : 626.02 = 257.15 : x
  2. Step 2: Convert to fraction form
    453.62/626.02 = 257.15/x
  3. Step 3: Cross multiply
    453.62x = 626.02 × 257.15
  4. Step 4: Simplify right side
    453.62x = 160,981.97
  5. Step 5: Solve for x
    x = 160,981.97/453.62
  6. Step 6: Final answer
    x = 354.88

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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.