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Finding the Fourth Proportional to 279.91, 419.05 and 171.37

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Solution

The fourth proportional to 279.91, 419.05 and 171.37 is: 256.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.91 : 419.05 = 171.37 : x
  2. Step 2: Convert to fraction form
    279.91/419.05 = 171.37/x
  3. Step 3: Cross multiply
    279.91x = 419.05 × 171.37
  4. Step 4: Simplify right side
    279.91x = 71,812.60
  5. Step 5: Solve for x
    x = 71,812.60/279.91
  6. Step 6: Final answer
    x = 256.56

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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.