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Finding the Fourth Proportional to 2,616.78, 3,611.31 and 1,731.03

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Solution

The fourth proportional to 2,616.78, 3,611.31 and 1,731.03 is: 2,388.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,616.78 : 3,611.31 = 1,731.03 : x
  2. Step 2: Convert to fraction form
    2,616.78/3,611.31 = 1,731.03/x
  3. Step 3: Cross multiply
    2,616.78x = 3,611.31 × 1,731.03
  4. Step 4: Simplify right side
    2,616.78x = 6,251,285.95
  5. Step 5: Solve for x
    x = 6,251,285.95/2,616.78
  6. Step 6: Final answer
    x = 2,388.92

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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.