Home / 1,912.81-2,869.26-614.29

Finding the Fourth Proportional to 1,912.81, 2,869.26 and 614.29

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Solution

The fourth proportional to 1,912.81, 2,869.26 and 614.29 is: 921.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.81 : 2,869.26 = 614.29 : x
  2. Step 2: Convert to fraction form
    1,912.81/2,869.26 = 614.29/x
  3. Step 3: Cross multiply
    1,912.81x = 2,869.26 × 614.29
  4. Step 4: Simplify right side
    1,912.81x = 1,762,557.73
  5. Step 5: Solve for x
    x = 1,762,557.73/1,912.81
  6. Step 6: Final answer
    x = 921.45

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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.