Home / 721,756,672.16-995,910,438.03-420,391,581.59

Finding the Fourth Proportional to 721,756,672.16, 995,910,438.03 and 420,391,581.59

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Solution

The fourth proportional to 721,756,672.16, 995,910,438.03 and 420,391,581.59 is: 580,074,116.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,756,672.16 : 995,910,438.03 = 420,391,581.59 : x
  2. Step 2: Convert to fraction form
    721,756,672.16/995,910,438.03 = 420,391,581.59/x
  3. Step 3: Cross multiply
    721,756,672.16x = 995,910,438.03 × 420,391,581.59
  4. Step 4: Simplify right side
    721,756,672.16x = 418,672,364,165,421,376
  5. Step 5: Solve for x
    x = 418,672,364,165,421,376/721,756,672.16
  6. Step 6: Final answer
    x = 580,074,116.82

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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.