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Finding the Fourth Proportional to 754.65, 1,131.96 and 206.85

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Solution

The fourth proportional to 754.65, 1,131.96 and 206.85 is: 310.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.65 : 1,131.96 = 206.85 : x
  2. Step 2: Convert to fraction form
    754.65/1,131.96 = 206.85/x
  3. Step 3: Cross multiply
    754.65x = 1,131.96 × 206.85
  4. Step 4: Simplify right side
    754.65x = 234,145.93
  5. Step 5: Solve for x
    x = 234,145.93/754.65
  6. Step 6: Final answer
    x = 310.27

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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.