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Finding the Fourth Proportional to 664.82, 997.37 and 253.95

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Solution

The fourth proportional to 664.82, 997.37 and 253.95 is: 380.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.82 : 997.37 = 253.95 : x
  2. Step 2: Convert to fraction form
    664.82/997.37 = 253.95/x
  3. Step 3: Cross multiply
    664.82x = 997.37 × 253.95
  4. Step 4: Simplify right side
    664.82x = 253,280.84
  5. Step 5: Solve for x
    x = 253,280.84/664.82
  6. Step 6: Final answer
    x = 380.98

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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.