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Finding the Fourth Proportional to 739.07, 1,108.52 and 191.21

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Solution

The fourth proportional to 739.07, 1,108.52 and 191.21 is: 286.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.07 : 1,108.52 = 191.21 : x
  2. Step 2: Convert to fraction form
    739.07/1,108.52 = 191.21/x
  3. Step 3: Cross multiply
    739.07x = 1,108.52 × 191.21
  4. Step 4: Simplify right side
    739.07x = 211,953.61
  5. Step 5: Solve for x
    x = 211,953.61/739.07
  6. Step 6: Final answer
    x = 286.79

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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.