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Finding the Fourth Proportional to 1,479, 2,039.78 and 889.42

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Solution

The fourth proportional to 1,479, 2,039.78 and 889.42 is: 1,226.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479 : 2,039.78 = 889.42 : x
  2. Step 2: Convert to fraction form
    1,479/2,039.78 = 889.42/x
  3. Step 3: Cross multiply
    1,479x = 2,039.78 × 889.42
  4. Step 4: Simplify right side
    1,479x = 1,814,221.13
  5. Step 5: Solve for x
    x = 1,814,221.13/1,479
  6. Step 6: Final answer
    x = 1,226.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.