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Finding the Fourth Proportional to 643.65, 966.66 and 335.71

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Solution

The fourth proportional to 643.65, 966.66 and 335.71 is: 504.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.65 : 966.66 = 335.71 : x
  2. Step 2: Convert to fraction form
    643.65/966.66 = 335.71/x
  3. Step 3: Cross multiply
    643.65x = 966.66 × 335.71
  4. Step 4: Simplify right side
    643.65x = 324,517.43
  5. Step 5: Solve for x
    x = 324,517.43/643.65
  6. Step 6: Final answer
    x = 504.18

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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.