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Finding the Fourth Proportional to 818.59, 1,229.33 and 635.43

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Solution

The fourth proportional to 818.59, 1,229.33 and 635.43 is: 954.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.59 : 1,229.33 = 635.43 : x
  2. Step 2: Convert to fraction form
    818.59/1,229.33 = 635.43/x
  3. Step 3: Cross multiply
    818.59x = 1,229.33 × 635.43
  4. Step 4: Simplify right side
    818.59x = 781,153.16
  5. Step 5: Solve for x
    x = 781,153.16/818.59
  6. Step 6: Final answer
    x = 954.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.