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Finding the Fourth Proportional to 664.90, 997.40 and 177.94

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Solution

The fourth proportional to 664.90, 997.40 and 177.94 is: 266.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.90 : 997.40 = 177.94 : x
  2. Step 2: Convert to fraction form
    664.90/997.40 = 177.94/x
  3. Step 3: Cross multiply
    664.90x = 997.40 × 177.94
  4. Step 4: Simplify right side
    664.90x = 177,477.36
  5. Step 5: Solve for x
    x = 177,477.36/664.90
  6. Step 6: Final answer
    x = 266.92

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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.