Home / 1,259,728,986.80-1,889,593,480.20-639,856,204.40

Finding the Fourth Proportional to 1,259,728,986.80, 1,889,593,480.20 and 639,856,204.40

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Solution

The fourth proportional to 1,259,728,986.80, 1,889,593,480.20 and 639,856,204.40 is: 959,784,306.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259,728,986.80 : 1,889,593,480.20 = 639,856,204.40 : x
  2. Step 2: Convert to fraction form
    1,259,728,986.80/1,889,593,480.20 = 639,856,204.40/x
  3. Step 3: Cross multiply
    1,259,728,986.80x = 1,889,593,480.20 × 639,856,204.40
  4. Step 4: Simplify right side
    1,259,728,986.80x = 1,209,068,112,099,758,592
  5. Step 5: Solve for x
    x = 1,209,068,112,099,758,592/1,259,728,986.80
  6. Step 6: Final answer
    x = 959,784,306.60

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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.