Home / 1,042.24-1,561.99-579.78

Finding the Fourth Proportional to 1,042.24, 1,561.99 and 579.78

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Solution

The fourth proportional to 1,042.24, 1,561.99 and 579.78 is: 868.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.24 : 1,561.99 = 579.78 : x
  2. Step 2: Convert to fraction form
    1,042.24/1,561.99 = 579.78/x
  3. Step 3: Cross multiply
    1,042.24x = 1,561.99 × 579.78
  4. Step 4: Simplify right side
    1,042.24x = 905,610.56
  5. Step 5: Solve for x
    x = 905,610.56/1,042.24
  6. Step 6: Final answer
    x = 868.91

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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.