Home / 1,919.17-2,648.19-1,079.74

Finding the Fourth Proportional to 1,919.17, 2,648.19 and 1,079.74

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Solution

The fourth proportional to 1,919.17, 2,648.19 and 1,079.74 is: 1,489.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.17 : 2,648.19 = 1,079.74 : x
  2. Step 2: Convert to fraction form
    1,919.17/2,648.19 = 1,079.74/x
  3. Step 3: Cross multiply
    1,919.17x = 2,648.19 × 1,079.74
  4. Step 4: Simplify right side
    1,919.17x = 2,859,356.67
  5. Step 5: Solve for x
    x = 2,859,356.67/1,919.17
  6. Step 6: Final answer
    x = 1,489.89

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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.