Home / 2,287.20-3,156.49-1,391.29

Finding the Fourth Proportional to 2,287.20, 3,156.49 and 1,391.29

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Solution

The fourth proportional to 2,287.20, 3,156.49 and 1,391.29 is: 1,920.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,287.20 : 3,156.49 = 1,391.29 : x
  2. Step 2: Convert to fraction form
    2,287.20/3,156.49 = 1,391.29/x
  3. Step 3: Cross multiply
    2,287.20x = 3,156.49 × 1,391.29
  4. Step 4: Simplify right side
    2,287.20x = 4,391,570.23
  5. Step 5: Solve for x
    x = 4,391,570.23/2,287.20
  6. Step 6: Final answer
    x = 1,920.07

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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.