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Finding the Fourth Proportional to 641.23, 884.89 and 346.49

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Solution

The fourth proportional to 641.23, 884.89 and 346.49 is: 478.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.23 : 884.89 = 346.49 : x
  2. Step 2: Convert to fraction form
    641.23/884.89 = 346.49/x
  3. Step 3: Cross multiply
    641.23x = 884.89 × 346.49
  4. Step 4: Simplify right side
    641.23x = 306,603.80
  5. Step 5: Solve for x
    x = 306,603.80/641.23
  6. Step 6: Final answer
    x = 478.15

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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.