Home / 1,315,340.40-1,969,511.40-839,449.20

Finding the Fourth Proportional to 1,315,340.40, 1,969,511.40 and 839,449.20

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Solution

The fourth proportional to 1,315,340.40, 1,969,511.40 and 839,449.20 is: 1,256,940.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,340.40 : 1,969,511.40 = 839,449.20 : x
  2. Step 2: Convert to fraction form
    1,315,340.40/1,969,511.40 = 839,449.20/x
  3. Step 3: Cross multiply
    1,315,340.40x = 1,969,511.40 × 839,449.20
  4. Step 4: Simplify right side
    1,315,340.40x = 1,653,304,769,120.88
  5. Step 5: Solve for x
    x = 1,653,304,769,120.88/1,315,340.40
  6. Step 6: Final answer
    x = 1,256,940.61

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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.