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Finding the Fourth Proportional to 819,782.80, 1,229,674.20 and 648,540.70

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Solution

The fourth proportional to 819,782.80, 1,229,674.20 and 648,540.70 is: 972,811.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,782.80 : 1,229,674.20 = 648,540.70 : x
  2. Step 2: Convert to fraction form
    819,782.80/1,229,674.20 = 648,540.70/x
  3. Step 3: Cross multiply
    819,782.80x = 1,229,674.20 × 648,540.70
  4. Step 4: Simplify right side
    819,782.80x = 797,493,766,439.94
  5. Step 5: Solve for x
    x = 797,493,766,439.94/819,782.80
  6. Step 6: Final answer
    x = 972,811.05

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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.