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Finding the Fourth Proportional to 641.89, 886.02 and 494.33

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Solution

The fourth proportional to 641.89, 886.02 and 494.33 is: 682.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.89 : 886.02 = 494.33 : x
  2. Step 2: Convert to fraction form
    641.89/886.02 = 494.33/x
  3. Step 3: Cross multiply
    641.89x = 886.02 × 494.33
  4. Step 4: Simplify right side
    641.89x = 437,986.27
  5. Step 5: Solve for x
    x = 437,986.27/641.89
  6. Step 6: Final answer
    x = 682.34

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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.