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Finding the Fourth Proportional to 643.66, 966.39 and 335.74

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Solution

The fourth proportional to 643.66, 966.39 and 335.74 is: 504.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.66 : 966.39 = 335.74 : x
  2. Step 2: Convert to fraction form
    643.66/966.39 = 335.74/x
  3. Step 3: Cross multiply
    643.66x = 966.39 × 335.74
  4. Step 4: Simplify right side
    643.66x = 324,455.78
  5. Step 5: Solve for x
    x = 324,455.78/643.66
  6. Step 6: Final answer
    x = 504.08

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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.