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Finding the Fourth Proportional to 868.05, 1,197.38 and 681.24

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Solution

The fourth proportional to 868.05, 1,197.38 and 681.24 is: 939.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.05 : 1,197.38 = 681.24 : x
  2. Step 2: Convert to fraction form
    868.05/1,197.38 = 681.24/x
  3. Step 3: Cross multiply
    868.05x = 1,197.38 × 681.24
  4. Step 4: Simplify right side
    868.05x = 815,709.34
  5. Step 5: Solve for x
    x = 815,709.34/868.05
  6. Step 6: Final answer
    x = 939.70

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1.5x scale

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.