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Finding the Fourth Proportional to 867.33, 1,196.80 and 535.40

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Solution

The fourth proportional to 867.33, 1,196.80 and 535.40 is: 738.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.33 : 1,196.80 = 535.40 : x
  2. Step 2: Convert to fraction form
    867.33/1,196.80 = 535.40/x
  3. Step 3: Cross multiply
    867.33x = 1,196.80 × 535.40
  4. Step 4: Simplify right side
    867.33x = 640,766.72
  5. Step 5: Solve for x
    x = 640,766.72/867.33
  6. Step 6: Final answer
    x = 738.78

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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.