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Finding the Fourth Proportional to 644.40, 964.98 and 335.16

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Solution

The fourth proportional to 644.40, 964.98 and 335.16 is: 501.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.40 : 964.98 = 335.16 : x
  2. Step 2: Convert to fraction form
    644.40/964.98 = 335.16/x
  3. Step 3: Cross multiply
    644.40x = 964.98 × 335.16
  4. Step 4: Simplify right side
    644.40x = 323,422.70
  5. Step 5: Solve for x
    x = 323,422.70/644.40
  6. Step 6: Final answer
    x = 501.90

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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.