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Finding the Fourth Proportional to 633.80, 949.22 and 611.90

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Solution

The fourth proportional to 633.80, 949.22 and 611.90 is: 916.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.80 : 949.22 = 611.90 : x
  2. Step 2: Convert to fraction form
    633.80/949.22 = 611.90/x
  3. Step 3: Cross multiply
    633.80x = 949.22 × 611.90
  4. Step 4: Simplify right side
    633.80x = 580,827.72
  5. Step 5: Solve for x
    x = 580,827.72/633.80
  6. Step 6: Final answer
    x = 916.42

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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.