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Finding the Fourth Proportional to 754.73, 1,131.89 and 512.74

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Solution

The fourth proportional to 754.73, 1,131.89 and 512.74 is: 768.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.73 : 1,131.89 = 512.74 : x
  2. Step 2: Convert to fraction form
    754.73/1,131.89 = 512.74/x
  3. Step 3: Cross multiply
    754.73x = 1,131.89 × 512.74
  4. Step 4: Simplify right side
    754.73x = 580,362.71
  5. Step 5: Solve for x
    x = 580,362.71/754.73
  6. Step 6: Final answer
    x = 768.97

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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.