Home / 1,179.25-1,769.55-439.38

Finding the Fourth Proportional to 1,179.25, 1,769.55 and 439.38

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Solution

The fourth proportional to 1,179.25, 1,769.55 and 439.38 is: 659.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.25 : 1,769.55 = 439.38 : x
  2. Step 2: Convert to fraction form
    1,179.25/1,769.55 = 439.38/x
  3. Step 3: Cross multiply
    1,179.25x = 1,769.55 × 439.38
  4. Step 4: Simplify right side
    1,179.25x = 777,504.88
  5. Step 5: Solve for x
    x = 777,504.88/1,179.25
  6. Step 6: Final answer
    x = 659.32

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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.