Home / 1,479.35-2,220.57-1,089.80

Finding the Fourth Proportional to 1,479.35, 2,220.57 and 1,089.80

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Solution

The fourth proportional to 1,479.35, 2,220.57 and 1,089.80 is: 1,635.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.35 : 2,220.57 = 1,089.80 : x
  2. Step 2: Convert to fraction form
    1,479.35/2,220.57 = 1,089.80/x
  3. Step 3: Cross multiply
    1,479.35x = 2,220.57 × 1,089.80
  4. Step 4: Simplify right side
    1,479.35x = 2,419,966.08
  5. Step 5: Solve for x
    x = 2,419,966.08/1,479.35
  6. Step 6: Final answer
    x = 1,635.83

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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.