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Finding the Fourth Proportional to 979,375.80, 1,469,063.70 and 643,452.60

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Solution

The fourth proportional to 979,375.80, 1,469,063.70 and 643,452.60 is: 965,178.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,375.80 : 1,469,063.70 = 643,452.60 : x
  2. Step 2: Convert to fraction form
    979,375.80/1,469,063.70 = 643,452.60/x
  3. Step 3: Cross multiply
    979,375.80x = 1,469,063.70 × 643,452.60
  4. Step 4: Simplify right side
    979,375.80x = 945,272,857,330.62
  5. Step 5: Solve for x
    x = 945,272,857,330.62/979,375.80
  6. Step 6: Final answer
    x = 965,178.90

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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.