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Finding the Fourth Proportional to 727.39, 1,090.02 and 361.68

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Solution

The fourth proportional to 727.39, 1,090.02 and 361.68 is: 541.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.39 : 1,090.02 = 361.68 : x
  2. Step 2: Convert to fraction form
    727.39/1,090.02 = 361.68/x
  3. Step 3: Cross multiply
    727.39x = 1,090.02 × 361.68
  4. Step 4: Simplify right side
    727.39x = 394,235.70
  5. Step 5: Solve for x
    x = 394,235.70/727.39
  6. Step 6: Final answer
    x = 541.99

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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.