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Finding the Fourth Proportional to 1,165.78, 1,748.97 and 516.67

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Solution

The fourth proportional to 1,165.78, 1,748.97 and 516.67 is: 775.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,165.78 : 1,748.97 = 516.67 : x
  2. Step 2: Convert to fraction form
    1,165.78/1,748.97 = 516.67/x
  3. Step 3: Cross multiply
    1,165.78x = 1,748.97 × 516.67
  4. Step 4: Simplify right side
    1,165.78x = 903,640.33
  5. Step 5: Solve for x
    x = 903,640.33/1,165.78
  6. Step 6: Final answer
    x = 775.14

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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.