Home / 1,127.20-1,690.26-579.10

Finding the Fourth Proportional to 1,127.20, 1,690.26 and 579.10

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Solution

The fourth proportional to 1,127.20, 1,690.26 and 579.10 is: 868.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.20 : 1,690.26 = 579.10 : x
  2. Step 2: Convert to fraction form
    1,127.20/1,690.26 = 579.10/x
  3. Step 3: Cross multiply
    1,127.20x = 1,690.26 × 579.10
  4. Step 4: Simplify right side
    1,127.20x = 978,829.57
  5. Step 5: Solve for x
    x = 978,829.57/1,127.20
  6. Step 6: Final answer
    x = 868.37

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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.