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Finding the Fourth Proportional to 417.72, 576.47 and 231.22

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Solution

The fourth proportional to 417.72, 576.47 and 231.22 is: 319.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.72 : 576.47 = 231.22 : x
  2. Step 2: Convert to fraction form
    417.72/576.47 = 231.22/x
  3. Step 3: Cross multiply
    417.72x = 576.47 × 231.22
  4. Step 4: Simplify right side
    417.72x = 133,291.39
  5. Step 5: Solve for x
    x = 133,291.39/417.72
  6. Step 6: Final answer
    x = 319.09

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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.