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Finding the Fourth Proportional to 2,286.81, 3,430.24 and 726.78

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Solution

The fourth proportional to 2,286.81, 3,430.24 and 726.78 is: 1,090.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,286.81 : 3,430.24 = 726.78 : x
  2. Step 2: Convert to fraction form
    2,286.81/3,430.24 = 726.78/x
  3. Step 3: Cross multiply
    2,286.81x = 3,430.24 × 726.78
  4. Step 4: Simplify right side
    2,286.81x = 2,493,029.83
  5. Step 5: Solve for x
    x = 2,493,029.83/2,286.81
  6. Step 6: Final answer
    x = 1,090.18

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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.