Home / 1,578.43-2,178.79-1,082.71

Finding the Fourth Proportional to 1,578.43, 2,178.79 and 1,082.71

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Solution

The fourth proportional to 1,578.43, 2,178.79 and 1,082.71 is: 1,494.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.43 : 2,178.79 = 1,082.71 : x
  2. Step 2: Convert to fraction form
    1,578.43/2,178.79 = 1,082.71/x
  3. Step 3: Cross multiply
    1,578.43x = 2,178.79 × 1,082.71
  4. Step 4: Simplify right side
    1,578.43x = 2,358,997.74
  5. Step 5: Solve for x
    x = 2,358,997.74/1,578.43
  6. Step 6: Final answer
    x = 1,494.52

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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.