Home / 1,287,121,870.80-1,930,682,806.20-469,260,853.20

Finding the Fourth Proportional to 1,287,121,870.80, 1,930,682,806.20 and 469,260,853.20

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Solution

The fourth proportional to 1,287,121,870.80, 1,930,682,806.20 and 469,260,853.20 is: 703,891,279.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,121,870.80 : 1,930,682,806.20 = 469,260,853.20 : x
  2. Step 2: Convert to fraction form
    1,287,121,870.80/1,930,682,806.20 = 469,260,853.20/x
  3. Step 3: Cross multiply
    1,287,121,870.80x = 1,930,682,806.20 × 469,260,853.20
  4. Step 4: Simplify right side
    1,287,121,870.80x = 905,993,860,895,982,208
  5. Step 5: Solve for x
    x = 905,993,860,895,982,208/1,287,121,870.80
  6. Step 6: Final answer
    x = 703,891,279.80

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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.