Home / 1,919.11-2,648.40-1,079.86

Finding the Fourth Proportional to 1,919.11, 2,648.40 and 1,079.86

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Solution

The fourth proportional to 1,919.11, 2,648.40 and 1,079.86 is: 1,490.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.11 : 2,648.40 = 1,079.86 : x
  2. Step 2: Convert to fraction form
    1,919.11/2,648.40 = 1,079.86/x
  3. Step 3: Cross multiply
    1,919.11x = 2,648.40 × 1,079.86
  4. Step 4: Simplify right side
    1,919.11x = 2,859,901.22
  5. Step 5: Solve for x
    x = 2,859,901.22/1,919.11
  6. Step 6: Final answer
    x = 1,490.22

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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.