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Finding the Fourth Proportional to 2,672.75, 3,689.42 and 2,392.49

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Solution

The fourth proportional to 2,672.75, 3,689.42 and 2,392.49 is: 3,302.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,672.75 : 3,689.42 = 2,392.49 : x
  2. Step 2: Convert to fraction form
    2,672.75/3,689.42 = 2,392.49/x
  3. Step 3: Cross multiply
    2,672.75x = 3,689.42 × 2,392.49
  4. Step 4: Simplify right side
    2,672.75x = 8,826,915.66
  5. Step 5: Solve for x
    x = 8,826,915.66/2,672.75
  6. Step 6: Final answer
    x = 3,302.56

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1.5x scale

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.