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Finding the Fourth Proportional to 868.23, 1,197.81 and 606.40

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Solution

The fourth proportional to 868.23, 1,197.81 and 606.40 is: 836.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.23 : 1,197.81 = 606.40 : x
  2. Step 2: Convert to fraction form
    868.23/1,197.81 = 606.40/x
  3. Step 3: Cross multiply
    868.23x = 1,197.81 × 606.40
  4. Step 4: Simplify right side
    868.23x = 726,348.99
  5. Step 5: Solve for x
    x = 726,348.99/868.23
  6. Step 6: Final answer
    x = 836.59

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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.