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Finding the Fourth Proportional to 289.53, 399.47 and 178.97

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Solution

The fourth proportional to 289.53, 399.47 and 178.97 is: 246.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.53 : 399.47 = 178.97 : x
  2. Step 2: Convert to fraction form
    289.53/399.47 = 178.97/x
  3. Step 3: Cross multiply
    289.53x = 399.47 × 178.97
  4. Step 4: Simplify right side
    289.53x = 71,490.25
  5. Step 5: Solve for x
    x = 71,490.25/289.53
  6. Step 6: Final answer
    x = 246.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.