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Finding the Fourth Proportional to 2,265.75, 3,398.63 and 726.75

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Solution

The fourth proportional to 2,265.75, 3,398.63 and 726.75 is: 1,090.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,265.75 : 3,398.63 = 726.75 : x
  2. Step 2: Convert to fraction form
    2,265.75/3,398.63 = 726.75/x
  3. Step 3: Cross multiply
    2,265.75x = 3,398.63 × 726.75
  4. Step 4: Simplify right side
    2,265.75x = 2,469,950.72
  5. Step 5: Solve for x
    x = 2,469,950.72/2,265.75
  6. Step 6: Final answer
    x = 1,090.13

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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.