Home / 1,099.20-1,649.28-579.08

Finding the Fourth Proportional to 1,099.20, 1,649.28 and 579.08

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Solution

The fourth proportional to 1,099.20, 1,649.28 and 579.08 is: 868.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.20 : 1,649.28 = 579.08 : x
  2. Step 2: Convert to fraction form
    1,099.20/1,649.28 = 579.08/x
  3. Step 3: Cross multiply
    1,099.20x = 1,649.28 × 579.08
  4. Step 4: Simplify right side
    1,099.20x = 955,065.06
  5. Step 5: Solve for x
    x = 955,065.06/1,099.20
  6. Step 6: Final answer
    x = 868.87

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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.