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Finding the Fourth Proportional to 868.24, 1,197.87 and 494.95

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Solution

The fourth proportional to 868.24, 1,197.87 and 494.95 is: 682.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.24 : 1,197.87 = 494.95 : x
  2. Step 2: Convert to fraction form
    868.24/1,197.87 = 494.95/x
  3. Step 3: Cross multiply
    868.24x = 1,197.87 × 494.95
  4. Step 4: Simplify right side
    868.24x = 592,885.43
  5. Step 5: Solve for x
    x = 592,885.43/868.24
  6. Step 6: Final answer
    x = 682.86

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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.