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Finding the Fourth Proportional to 754.54, 1,131.38 and 291.99

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Solution

The fourth proportional to 754.54, 1,131.38 and 291.99 is: 437.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.54 : 1,131.38 = 291.99 : x
  2. Step 2: Convert to fraction form
    754.54/1,131.38 = 291.99/x
  3. Step 3: Cross multiply
    754.54x = 1,131.38 × 291.99
  4. Step 4: Simplify right side
    754.54x = 330,351.65
  5. Step 5: Solve for x
    x = 330,351.65/754.54
  6. Step 6: Final answer
    x = 437.82

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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.