Home / 721,756,674.16-995,910,440.78-420,391,583.60

Finding the Fourth Proportional to 721,756,674.16, 995,910,440.78 and 420,391,583.60

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Solution

The fourth proportional to 721,756,674.16, 995,910,440.78 and 420,391,583.60 is: 580,074,119.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,756,674.16 : 995,910,440.78 = 420,391,583.60 : x
  2. Step 2: Convert to fraction form
    721,756,674.16/995,910,440.78 = 420,391,583.60/x
  3. Step 3: Cross multiply
    721,756,674.16x = 995,910,440.78 × 420,391,583.60
  4. Step 4: Simplify right side
    721,756,674.16x = 418,672,367,323,278,208
  5. Step 5: Solve for x
    x = 418,672,367,323,278,208/721,756,674.16
  6. Step 6: Final answer
    x = 580,074,119.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.