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Finding the Fourth Proportional to 664.86, 997.14 and 253.85

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Solution

The fourth proportional to 664.86, 997.14 and 253.85 is: 380.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.86 : 997.14 = 253.85 : x
  2. Step 2: Convert to fraction form
    664.86/997.14 = 253.85/x
  3. Step 3: Cross multiply
    664.86x = 997.14 × 253.85
  4. Step 4: Simplify right side
    664.86x = 253,123.99
  5. Step 5: Solve for x
    x = 253,123.99/664.86
  6. Step 6: Final answer
    x = 380.72

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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.