Home / 1,983.38-2,972.91-1,290.55

Finding the Fourth Proportional to 1,983.38, 2,972.91 and 1,290.55

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Solution

The fourth proportional to 1,983.38, 2,972.91 and 1,290.55 is: 1,934.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,983.38 : 2,972.91 = 1,290.55 : x
  2. Step 2: Convert to fraction form
    1,983.38/2,972.91 = 1,290.55/x
  3. Step 3: Cross multiply
    1,983.38x = 2,972.91 × 1,290.55
  4. Step 4: Simplify right side
    1,983.38x = 3,836,674.14
  5. Step 5: Solve for x
    x = 3,836,674.14/1,983.38
  6. Step 6: Final answer
    x = 1,934.41

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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.