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Finding the Fourth Proportional to 811,375.80, 1,217,063.70 and 798,934.20

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Solution

The fourth proportional to 811,375.80, 1,217,063.70 and 798,934.20 is: 1,198,401.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,375.80 : 1,217,063.70 = 798,934.20 : x
  2. Step 2: Convert to fraction form
    811,375.80/1,217,063.70 = 798,934.20/x
  3. Step 3: Cross multiply
    811,375.80x = 1,217,063.70 × 798,934.20
  4. Step 4: Simplify right side
    811,375.80x = 972,353,813,508.54
  5. Step 5: Solve for x
    x = 972,353,813,508.54/811,375.80
  6. Step 6: Final answer
    x = 1,198,401.30

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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.