Home / 724,990,920.80-1,087,486,381.20-449,491,906.40

Finding the Fourth Proportional to 724,990,920.80, 1,087,486,381.20 and 449,491,906.40

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Solution

The fourth proportional to 724,990,920.80, 1,087,486,381.20 and 449,491,906.40 is: 674,237,859.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,990,920.80 : 1,087,486,381.20 = 449,491,906.40 : x
  2. Step 2: Convert to fraction form
    724,990,920.80/1,087,486,381.20 = 449,491,906.40/x
  3. Step 3: Cross multiply
    724,990,920.80x = 1,087,486,381.20 × 449,491,906.40
  4. Step 4: Simplify right side
    724,990,920.80x = 488,816,326,669,625,088
  5. Step 5: Solve for x
    x = 488,816,326,669,625,088/724,990,920.80
  6. Step 6: Final answer
    x = 674,237,859.60

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1.5x scale

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.