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Finding the Fourth Proportional to 758.16, 1,134.54 and 667.44

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Solution

The fourth proportional to 758.16, 1,134.54 and 667.44 is: 998.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.16 : 1,134.54 = 667.44 : x
  2. Step 2: Convert to fraction form
    758.16/1,134.54 = 667.44/x
  3. Step 3: Cross multiply
    758.16x = 1,134.54 × 667.44
  4. Step 4: Simplify right side
    758.16x = 757,237.38
  5. Step 5: Solve for x
    x = 757,237.38/758.16
  6. Step 6: Final answer
    x = 998.78

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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.