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Finding the Fourth Proportional to 739.75, 1,109.70 and 191.93

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Solution

The fourth proportional to 739.75, 1,109.70 and 191.93 is: 287.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.75 : 1,109.70 = 191.93 : x
  2. Step 2: Convert to fraction form
    739.75/1,109.70 = 191.93/x
  3. Step 3: Cross multiply
    739.75x = 1,109.70 × 191.93
  4. Step 4: Simplify right side
    739.75x = 212,984.72
  5. Step 5: Solve for x
    x = 212,984.72/739.75
  6. Step 6: Final answer
    x = 287.91

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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.