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Finding the Fourth Proportional to 679.24, 1,018.26 and 516.52

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Solution

The fourth proportional to 679.24, 1,018.26 and 516.52 is: 774.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.24 : 1,018.26 = 516.52 : x
  2. Step 2: Convert to fraction form
    679.24/1,018.26 = 516.52/x
  3. Step 3: Cross multiply
    679.24x = 1,018.26 × 516.52
  4. Step 4: Simplify right side
    679.24x = 525,951.66
  5. Step 5: Solve for x
    x = 525,951.66/679.24
  6. Step 6: Final answer
    x = 774.32

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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.