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Finding the Fourth Proportional to 868.43, 1,197.51 and 742.88

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Solution

The fourth proportional to 868.43, 1,197.51 and 742.88 is: 1,024.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.43 : 1,197.51 = 742.88 : x
  2. Step 2: Convert to fraction form
    868.43/1,197.51 = 742.88/x
  3. Step 3: Cross multiply
    868.43x = 1,197.51 × 742.88
  4. Step 4: Simplify right side
    868.43x = 889,606.23
  5. Step 5: Solve for x
    x = 889,606.23/868.43
  6. Step 6: Final answer
    x = 1,024.38

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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.