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Finding the Fourth Proportional to 2,880.92, 3,974.42 and 1,761.90

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Solution

The fourth proportional to 2,880.92, 3,974.42 and 1,761.90 is: 2,430.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880.92 : 3,974.42 = 1,761.90 : x
  2. Step 2: Convert to fraction form
    2,880.92/3,974.42 = 1,761.90/x
  3. Step 3: Cross multiply
    2,880.92x = 3,974.42 × 1,761.90
  4. Step 4: Simplify right side
    2,880.92x = 7,002,521.79
  5. Step 5: Solve for x
    x = 7,002,521.79/2,880.92
  6. Step 6: Final answer
    x = 2,430.66

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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.