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Finding the Fourth Proportional to 643.98, 966.79 and 336.04

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Solution

The fourth proportional to 643.98, 966.79 and 336.04 is: 504.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.98 : 966.79 = 336.04 : x
  2. Step 2: Convert to fraction form
    643.98/966.79 = 336.04/x
  3. Step 3: Cross multiply
    643.98x = 966.79 × 336.04
  4. Step 4: Simplify right side
    643.98x = 324,880.11
  5. Step 5: Solve for x
    x = 324,880.11/643.98
  6. Step 6: Final answer
    x = 504.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.