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Finding the Fourth Proportional to 739.21, 1,108.44 and 252.11

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Solution

The fourth proportional to 739.21, 1,108.44 and 252.11 is: 378.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.21 : 1,108.44 = 252.11 : x
  2. Step 2: Convert to fraction form
    739.21/1,108.44 = 252.11/x
  3. Step 3: Cross multiply
    739.21x = 1,108.44 × 252.11
  4. Step 4: Simplify right side
    739.21x = 279,448.81
  5. Step 5: Solve for x
    x = 279,448.81/739.21
  6. Step 6: Final answer
    x = 378.04

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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.