Home / 2,391.80-3,581.05-1,219.28

Finding the Fourth Proportional to 2,391.80, 3,581.05 and 1,219.28

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Solution

The fourth proportional to 2,391.80, 3,581.05 and 1,219.28 is: 1,825.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.80 : 3,581.05 = 1,219.28 : x
  2. Step 2: Convert to fraction form
    2,391.80/3,581.05 = 1,219.28/x
  3. Step 3: Cross multiply
    2,391.80x = 3,581.05 × 1,219.28
  4. Step 4: Simplify right side
    2,391.80x = 4,366,281.69
  5. Step 5: Solve for x
    x = 4,366,281.69/2,391.80
  6. Step 6: Final answer
    x = 1,825.52

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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.