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Finding the Fourth Proportional to 1,778.92, 2,680.24 and 1,605.78

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Solution

The fourth proportional to 1,778.92, 2,680.24 and 1,605.78 is: 2,419.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.92 : 2,680.24 = 1,605.78 : x
  2. Step 2: Convert to fraction form
    1,778.92/2,680.24 = 1,605.78/x
  3. Step 3: Cross multiply
    1,778.92x = 2,680.24 × 1,605.78
  4. Step 4: Simplify right side
    1,778.92x = 4,303,882.49
  5. Step 5: Solve for x
    x = 4,303,882.49/1,778.92
  6. Step 6: Final answer
    x = 2,419.38

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.