Home / 819,072,000.80-1,228,608,001.20-543,572,986.40

Finding the Fourth Proportional to 819,072,000.80, 1,228,608,001.20 and 543,572,986.40

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Solution

The fourth proportional to 819,072,000.80, 1,228,608,001.20 and 543,572,986.40 is: 815,359,479.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,072,000.80 : 1,228,608,001.20 = 543,572,986.40 : x
  2. Step 2: Convert to fraction form
    819,072,000.80/1,228,608,001.20 = 543,572,986.40/x
  3. Step 3: Cross multiply
    819,072,000.80x = 1,228,608,001.20 × 543,572,986.40
  4. Step 4: Simplify right side
    819,072,000.80x = 667,838,120,327,218,816
  5. Step 5: Solve for x
    x = 667,838,120,327,218,816/819,072,000.80
  6. Step 6: Final answer
    x = 815,359,479.60

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Double scale
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Similar ratio
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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.