Home / 1,279,638,010.70-1,919,457,016.05-726,726,794.30

Finding the Fourth Proportional to 1,279,638,010.70, 1,919,457,016.05 and 726,726,794.30

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Solution

The fourth proportional to 1,279,638,010.70, 1,919,457,016.05 and 726,726,794.30 is: 1,090,090,191.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,638,010.70 : 1,919,457,016.05 = 726,726,794.30 : x
  2. Step 2: Convert to fraction form
    1,279,638,010.70/1,919,457,016.05 = 726,726,794.30/x
  3. Step 3: Cross multiply
    1,279,638,010.70x = 1,919,457,016.05 × 726,726,794.30
  4. Step 4: Simplify right side
    1,279,638,010.70x = 1,394,920,844,070,660,096
  5. Step 5: Solve for x
    x = 1,394,920,844,070,660,096/1,279,638,010.70
  6. Step 6: Final answer
    x = 1,090,090,191.45

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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.