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Finding the Fourth Proportional to 2,625.93, 3,940.38 and 983.61

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Solution

The fourth proportional to 2,625.93, 3,940.38 and 983.61 is: 1,475.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,625.93 : 3,940.38 = 983.61 : x
  2. Step 2: Convert to fraction form
    2,625.93/3,940.38 = 983.61/x
  3. Step 3: Cross multiply
    2,625.93x = 3,940.38 × 983.61
  4. Step 4: Simplify right side
    2,625.93x = 3,875,797.17
  5. Step 5: Solve for x
    x = 3,875,797.17/2,625.93
  6. Step 6: Final answer
    x = 1,475.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.