Home / 1,964.40-2,943.92-1,085.60

Finding the Fourth Proportional to 1,964.40, 2,943.92 and 1,085.60

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Solution

The fourth proportional to 1,964.40, 2,943.92 and 1,085.60 is: 1,626.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,964.40 : 2,943.92 = 1,085.60 : x
  2. Step 2: Convert to fraction form
    1,964.40/2,943.92 = 1,085.60/x
  3. Step 3: Cross multiply
    1,964.40x = 2,943.92 × 1,085.60
  4. Step 4: Simplify right side
    1,964.40x = 3,195,926.57
  5. Step 5: Solve for x
    x = 3,195,926.57/1,964.40
  6. Step 6: Final answer
    x = 1,626.92

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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.