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Finding the Fourth Proportional to 917,260.80, 1,375,891.20 and 880,519.20

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Solution

The fourth proportional to 917,260.80, 1,375,891.20 and 880,519.20 is: 1,320,778.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,260.80 : 1,375,891.20 = 880,519.20 : x
  2. Step 2: Convert to fraction form
    917,260.80/1,375,891.20 = 880,519.20/x
  3. Step 3: Cross multiply
    917,260.80x = 1,375,891.20 × 880,519.20
  4. Step 4: Simplify right side
    917,260.80x = 1,211,498,618,711.04
  5. Step 5: Solve for x
    x = 1,211,498,618,711.04/917,260.80
  6. Step 6: Final answer
    x = 1,320,778.80

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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.