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Finding the Fourth Proportional to 739.21, 1,108.97 and 276.99

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Solution

The fourth proportional to 739.21, 1,108.97 and 276.99 is: 415.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.21 : 1,108.97 = 276.99 : x
  2. Step 2: Convert to fraction form
    739.21/1,108.97 = 276.99/x
  3. Step 3: Cross multiply
    739.21x = 1,108.97 × 276.99
  4. Step 4: Simplify right side
    739.21x = 307,171.17
  5. Step 5: Solve for x
    x = 307,171.17/739.21
  6. Step 6: Final answer
    x = 415.54

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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.