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Finding the Fourth Proportional to 867.26, 1,196.79 and 517.74

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Solution

The fourth proportional to 867.26, 1,196.79 and 517.74 is: 714.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.26 : 1,196.79 = 517.74 : x
  2. Step 2: Convert to fraction form
    867.26/1,196.79 = 517.74/x
  3. Step 3: Cross multiply
    867.26x = 1,196.79 × 517.74
  4. Step 4: Simplify right side
    867.26x = 619,626.05
  5. Step 5: Solve for x
    x = 619,626.05/867.26
  6. Step 6: Final answer
    x = 714.46

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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.