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Finding the Fourth Proportional to 2,793.48, 4,189.71 and 818.70

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Solution

The fourth proportional to 2,793.48, 4,189.71 and 818.70 is: 1,227.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,793.48 : 4,189.71 = 818.70 : x
  2. Step 2: Convert to fraction form
    2,793.48/4,189.71 = 818.70/x
  3. Step 3: Cross multiply
    2,793.48x = 4,189.71 × 818.70
  4. Step 4: Simplify right side
    2,793.48x = 3,430,115.58
  5. Step 5: Solve for x
    x = 3,430,115.58/2,793.48
  6. Step 6: Final answer
    x = 1,227.90

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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.