Home / 663,920,917.80-995,209,530.30-391,151,279.40

Finding the Fourth Proportional to 663,920,917.80, 995,209,530.30 and 391,151,279.40

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Solution

The fourth proportional to 663,920,917.80, 995,209,530.30 and 391,151,279.40 is: 586,331,098.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,920,917.80 : 995,209,530.30 = 391,151,279.40 : x
  2. Step 2: Convert to fraction form
    663,920,917.80/995,209,530.30 = 391,151,279.40/x
  3. Step 3: Cross multiply
    663,920,917.80x = 995,209,530.30 × 391,151,279.40
  4. Step 4: Simplify right side
    663,920,917.80x = 389,277,481,047,918,016
  5. Step 5: Solve for x
    x = 389,277,481,047,918,016/663,920,917.80
  6. Step 6: Final answer
    x = 586,331,098.50

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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.