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Finding the Fourth Proportional to 754.54, 1,040.94 and 518.11

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Solution

The fourth proportional to 754.54, 1,040.94 and 518.11 is: 714.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.54 : 1,040.94 = 518.11 : x
  2. Step 2: Convert to fraction form
    754.54/1,040.94 = 518.11/x
  3. Step 3: Cross multiply
    754.54x = 1,040.94 × 518.11
  4. Step 4: Simplify right side
    754.54x = 539,321.42
  5. Step 5: Solve for x
    x = 539,321.42/754.54
  6. Step 6: Final answer
    x = 714.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.