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Finding the Fourth Proportional to 643.38, 964.73 and 334.49

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Solution

The fourth proportional to 643.38, 964.73 and 334.49 is: 501.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.38 : 964.73 = 334.49 : x
  2. Step 2: Convert to fraction form
    643.38/964.73 = 334.49/x
  3. Step 3: Cross multiply
    643.38x = 964.73 × 334.49
  4. Step 4: Simplify right side
    643.38x = 322,686.04
  5. Step 5: Solve for x
    x = 322,686.04/643.38
  6. Step 6: Final answer
    x = 501.55

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Double scale
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Similar ratio
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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.