Home / 1,391,740,974.92-1,920,610,138.15-819,548,991.56

Finding the Fourth Proportional to 1,391,740,974.92, 1,920,610,138.15 and 819,548,991.56

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Solution

The fourth proportional to 1,391,740,974.92, 1,920,610,138.15 and 819,548,991.56 is: 1,130,982,079.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,740,974.92 : 1,920,610,138.15 = 819,548,991.56 : x
  2. Step 2: Convert to fraction form
    1,391,740,974.92/1,920,610,138.15 = 819,548,991.56/x
  3. Step 3: Cross multiply
    1,391,740,974.92x = 1,920,610,138.15 × 819,548,991.56
  4. Step 4: Simplify right side
    1,391,740,974.92x = 1,574,034,101,900,744,704
  5. Step 5: Solve for x
    x = 1,574,034,101,900,744,704/1,391,740,974.92
  6. Step 6: Final answer
    x = 1,130,982,079.47

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.