Home / 1,912.45-2,869.14-613.93

Finding the Fourth Proportional to 1,912.45, 2,869.14 and 613.93

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Solution

The fourth proportional to 1,912.45, 2,869.14 and 613.93 is: 921.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.45 : 2,869.14 = 613.93 : x
  2. Step 2: Convert to fraction form
    1,912.45/2,869.14 = 613.93/x
  3. Step 3: Cross multiply
    1,912.45x = 2,869.14 × 613.93
  4. Step 4: Simplify right side
    1,912.45x = 1,761,451.12
  5. Step 5: Solve for x
    x = 1,761,451.12/1,912.45
  6. Step 6: Final answer
    x = 921.04

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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.