Home / 1,179.20-1,767.34-485.43

Finding the Fourth Proportional to 1,179.20, 1,767.34 and 485.43

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Solution

The fourth proportional to 1,179.20, 1,767.34 and 485.43 is: 727.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.20 : 1,767.34 = 485.43 : x
  2. Step 2: Convert to fraction form
    1,179.20/1,767.34 = 485.43/x
  3. Step 3: Cross multiply
    1,179.20x = 1,767.34 × 485.43
  4. Step 4: Simplify right side
    1,179.20x = 857,918.64
  5. Step 5: Solve for x
    x = 857,918.64/1,179.20
  6. Step 6: Final answer
    x = 727.55

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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.