Home / 3,178.38-4,761.09-1,328.75

Finding the Fourth Proportional to 3,178.38, 4,761.09 and 1,328.75

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Solution

The fourth proportional to 3,178.38, 4,761.09 and 1,328.75 is: 1,990.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.38 : 4,761.09 = 1,328.75 : x
  2. Step 2: Convert to fraction form
    3,178.38/4,761.09 = 1,328.75/x
  3. Step 3: Cross multiply
    3,178.38x = 4,761.09 × 1,328.75
  4. Step 4: Simplify right side
    3,178.38x = 6,326,274.53
  5. Step 5: Solve for x
    x = 6,326,274.53/3,178.38
  6. Step 6: Final answer
    x = 1,990.41

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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.