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Finding the Fourth Proportional to 867.96, 1,196.22 and 720.60

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Solution

The fourth proportional to 867.96, 1,196.22 and 720.60 is: 993.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.96 : 1,196.22 = 720.60 : x
  2. Step 2: Convert to fraction form
    867.96/1,196.22 = 720.60/x
  3. Step 3: Cross multiply
    867.96x = 1,196.22 × 720.60
  4. Step 4: Simplify right side
    867.96x = 861,996.13
  5. Step 5: Solve for x
    x = 861,996.13/867.96
  6. Step 6: Final answer
    x = 993.13

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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.