Home / 1,919.31-2,648.90-1,122.87

Finding the Fourth Proportional to 1,919.31, 2,648.90 and 1,122.87

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Solution

The fourth proportional to 1,919.31, 2,648.90 and 1,122.87 is: 1,549.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.31 : 2,648.90 = 1,122.87 : x
  2. Step 2: Convert to fraction form
    1,919.31/2,648.90 = 1,122.87/x
  3. Step 3: Cross multiply
    1,919.31x = 2,648.90 × 1,122.87
  4. Step 4: Simplify right side
    1,919.31x = 2,974,370.34
  5. Step 5: Solve for x
    x = 2,974,370.34/1,919.31
  6. Step 6: Final answer
    x = 1,549.71

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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.