Home / 663,920,408.80-995,208,766.80-391,150,770.40

Finding the Fourth Proportional to 663,920,408.80, 995,208,766.80 and 391,150,770.40

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Solution

The fourth proportional to 663,920,408.80, 995,208,766.80 and 391,150,770.40 is: 586,330,335.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,920,408.80 : 995,208,766.80 = 391,150,770.40 : x
  2. Step 2: Convert to fraction form
    663,920,408.80/995,208,766.80 = 391,150,770.40/x
  3. Step 3: Cross multiply
    663,920,408.80x = 995,208,766.80 × 391,150,770.40
  4. Step 4: Simplify right side
    663,920,408.80x = 389,276,675,842,653,888
  5. Step 5: Solve for x
    x = 389,276,675,842,653,888/663,920,408.80
  6. Step 6: Final answer
    x = 586,330,335.21

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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.