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Finding the Fourth Proportional to 638,608,512.80, 957,912,769.20 and 569,733,759.20

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Solution

The fourth proportional to 638,608,512.80, 957,912,769.20 and 569,733,759.20 is: 854,600,638.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,608,512.80 : 957,912,769.20 = 569,733,759.20 : x
  2. Step 2: Convert to fraction form
    638,608,512.80/957,912,769.20 = 569,733,759.20/x
  3. Step 3: Cross multiply
    638,608,512.80x = 957,912,769.20 × 569,733,759.20
  4. Step 4: Simplify right side
    638,608,512.80x = 545,755,242,981,998,080
  5. Step 5: Solve for x
    x = 545,755,242,981,998,080/638,608,512.80
  6. Step 6: Final answer
    x = 854,600,638.80

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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.