Home / 1,291,712.80-1,936,694.40-660,107.20

Finding the Fourth Proportional to 1,291,712.80, 1,936,694.40 and 660,107.20

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Solution

The fourth proportional to 1,291,712.80, 1,936,694.40 and 660,107.20 is: 989,713.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,712.80 : 1,936,694.40 = 660,107.20 : x
  2. Step 2: Convert to fraction form
    1,291,712.80/1,936,694.40 = 660,107.20/x
  3. Step 3: Cross multiply
    1,291,712.80x = 1,936,694.40 × 660,107.20
  4. Step 4: Simplify right side
    1,291,712.80x = 1,278,425,917,639.68
  5. Step 5: Solve for x
    x = 1,278,425,917,639.68/1,291,712.80
  6. Step 6: Final answer
    x = 989,713.75

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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.