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Finding the Fourth Proportional to 664.84, 997.66 and 254.32

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Solution

The fourth proportional to 664.84, 997.66 and 254.32 is: 381.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.84 : 997.66 = 254.32 : x
  2. Step 2: Convert to fraction form
    664.84/997.66 = 254.32/x
  3. Step 3: Cross multiply
    664.84x = 997.66 × 254.32
  4. Step 4: Simplify right side
    664.84x = 253,724.89
  5. Step 5: Solve for x
    x = 253,724.89/664.84
  6. Step 6: Final answer
    x = 381.63

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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.