Home / 663,921,084.80-995,209,780.80-391,151,446.40

Finding the Fourth Proportional to 663,921,084.80, 995,209,780.80 and 391,151,446.40

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Solution

The fourth proportional to 663,921,084.80, 995,209,780.80 and 391,151,446.40 is: 586,331,348.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,921,084.80 : 995,209,780.80 = 391,151,446.40 : x
  2. Step 2: Convert to fraction form
    663,921,084.80/995,209,780.80 = 391,151,446.40/x
  3. Step 3: Cross multiply
    663,921,084.80x = 995,209,780.80 × 391,151,446.40
  4. Step 4: Simplify right side
    663,921,084.80x = 389,277,745,231,346,880
  5. Step 5: Solve for x
    x = 389,277,745,231,346,880/663,921,084.80
  6. Step 6: Final answer
    x = 586,331,348.93

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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.