Home / 1,290,983,681.88-1,781,313,824.70-769,511,436.12

Finding the Fourth Proportional to 1,290,983,681.88, 1,781,313,824.70 and 769,511,436.12

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Solution

The fourth proportional to 1,290,983,681.88, 1,781,313,824.70 and 769,511,436.12 is: 1,061,780,546.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,983,681.88 : 1,781,313,824.70 = 769,511,436.12 : x
  2. Step 2: Convert to fraction form
    1,290,983,681.88/1,781,313,824.70 = 769,511,436.12/x
  3. Step 3: Cross multiply
    1,290,983,681.88x = 1,781,313,824.70 × 769,511,436.12
  4. Step 4: Simplify right side
    1,290,983,681.88x = 1,370,741,359,425,306,880
  5. Step 5: Solve for x
    x = 1,370,741,359,425,306,880/1,290,983,681.88
  6. Step 6: Final answer
    x = 1,061,780,546.62

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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.