Home / 1,912.90-2,869.80-614.38

Finding the Fourth Proportional to 1,912.90, 2,869.80 and 614.38

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Solution

The fourth proportional to 1,912.90, 2,869.80 and 614.38 is: 921.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.90 : 2,869.80 = 614.38 : x
  2. Step 2: Convert to fraction form
    1,912.90/2,869.80 = 614.38/x
  3. Step 3: Cross multiply
    1,912.90x = 2,869.80 × 614.38
  4. Step 4: Simplify right side
    1,912.90x = 1,763,147.72
  5. Step 5: Solve for x
    x = 1,763,147.72/1,912.90
  6. Step 6: Final answer
    x = 921.71

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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.