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Finding the Fourth Proportional to 867.27, 1,193.90 and 670.41

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Solution

The fourth proportional to 867.27, 1,193.90 and 670.41 is: 922.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.27 : 1,193.90 = 670.41 : x
  2. Step 2: Convert to fraction form
    867.27/1,193.90 = 670.41/x
  3. Step 3: Cross multiply
    867.27x = 1,193.90 × 670.41
  4. Step 4: Simplify right side
    867.27x = 800,399.15
  5. Step 5: Solve for x
    x = 800,399.15/867.27
  6. Step 6: Final answer
    x = 922.90

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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.