Home / 1,912.38-2,871.45-1,091.58

Finding the Fourth Proportional to 1,912.38, 2,871.45 and 1,091.58

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Solution

The fourth proportional to 1,912.38, 2,871.45 and 1,091.58 is: 1,639.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.38 : 2,871.45 = 1,091.58 : x
  2. Step 2: Convert to fraction form
    1,912.38/2,871.45 = 1,091.58/x
  3. Step 3: Cross multiply
    1,912.38x = 2,871.45 × 1,091.58
  4. Step 4: Simplify right side
    1,912.38x = 3,134,417.39
  5. Step 5: Solve for x
    x = 3,134,417.39/1,912.38
  6. Step 6: Final answer
    x = 1,639.01

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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.