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Finding the Fourth Proportional to 644.49, 964.89 and 335.61

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Solution

The fourth proportional to 644.49, 964.89 and 335.61 is: 502.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.49 : 964.89 = 335.61 : x
  2. Step 2: Convert to fraction form
    644.49/964.89 = 335.61/x
  3. Step 3: Cross multiply
    644.49x = 964.89 × 335.61
  4. Step 4: Simplify right side
    644.49x = 323,826.73
  5. Step 5: Solve for x
    x = 323,826.73/644.49
  6. Step 6: Final answer
    x = 502.45

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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.