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Finding the Fourth Proportional to 634.12, 949.56 and 543.40

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Solution

The fourth proportional to 634.12, 949.56 and 543.40 is: 813.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.12 : 949.56 = 543.40 : x
  2. Step 2: Convert to fraction form
    634.12/949.56 = 543.40/x
  3. Step 3: Cross multiply
    634.12x = 949.56 × 543.40
  4. Step 4: Simplify right side
    634.12x = 515,990.90
  5. Step 5: Solve for x
    x = 515,990.90/634.12
  6. Step 6: Final answer
    x = 813.71

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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.