Home / 1,912.92-2,639.40-1,127.04

Finding the Fourth Proportional to 1,912.92, 2,639.40 and 1,127.04

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Solution

The fourth proportional to 1,912.92, 2,639.40 and 1,127.04 is: 1,555.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.92 : 2,639.40 = 1,127.04 : x
  2. Step 2: Convert to fraction form
    1,912.92/2,639.40 = 1,127.04/x
  3. Step 3: Cross multiply
    1,912.92x = 2,639.40 × 1,127.04
  4. Step 4: Simplify right side
    1,912.92x = 2,974,709.38
  5. Step 5: Solve for x
    x = 2,974,709.38/1,912.92
  6. Step 6: Final answer
    x = 1,555.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.