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Finding the Fourth Proportional to 726.89, 1,090.33 and 361.94

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Solution

The fourth proportional to 726.89, 1,090.33 and 361.94 is: 542.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.89 : 1,090.33 = 361.94 : x
  2. Step 2: Convert to fraction form
    726.89/1,090.33 = 361.94/x
  3. Step 3: Cross multiply
    726.89x = 1,090.33 × 361.94
  4. Step 4: Simplify right side
    726.89x = 394,627.68
  5. Step 5: Solve for x
    x = 394,627.68/726.89
  6. Step 6: Final answer
    x = 542.90

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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.