Home / 1,912.90-2,869.07-614.20

Finding the Fourth Proportional to 1,912.90, 2,869.07 and 614.20

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Solution

The fourth proportional to 1,912.90, 2,869.07 and 614.20 is: 921.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.90 : 2,869.07 = 614.20 : x
  2. Step 2: Convert to fraction form
    1,912.90/2,869.07 = 614.20/x
  3. Step 3: Cross multiply
    1,912.90x = 2,869.07 × 614.20
  4. Step 4: Simplify right side
    1,912.90x = 1,762,168.45
  5. Step 5: Solve for x
    x = 1,762,168.45/1,912.90
  6. Step 6: Final answer
    x = 921.21

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1.5x scale

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.