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Finding the Fourth Proportional to 664.84, 997.79 and 460.85

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Solution

The fourth proportional to 664.84, 997.79 and 460.85 is: 691.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.84 : 997.79 = 460.85 : x
  2. Step 2: Convert to fraction form
    664.84/997.79 = 460.85/x
  3. Step 3: Cross multiply
    664.84x = 997.79 × 460.85
  4. Step 4: Simplify right side
    664.84x = 459,824.23
  5. Step 5: Solve for x
    x = 459,824.23/664.84
  6. Step 6: Final answer
    x = 691.63

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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.