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Finding the Fourth Proportional to 2,174.27, 3,260.78 and 693.48

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Solution

The fourth proportional to 2,174.27, 3,260.78 and 693.48 is: 1,040.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.27 : 3,260.78 = 693.48 : x
  2. Step 2: Convert to fraction form
    2,174.27/3,260.78 = 693.48/x
  3. Step 3: Cross multiply
    2,174.27x = 3,260.78 × 693.48
  4. Step 4: Simplify right side
    2,174.27x = 2,261,282.25
  5. Step 5: Solve for x
    x = 2,261,282.25/2,174.27
  6. Step 6: Final answer
    x = 1,040.02

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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.