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Finding the Fourth Proportional to 417.58, 576.25 and 231.05

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Solution

The fourth proportional to 417.58, 576.25 and 231.05 is: 318.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.58 : 576.25 = 231.05 : x
  2. Step 2: Convert to fraction form
    417.58/576.25 = 231.05/x
  3. Step 3: Cross multiply
    417.58x = 576.25 × 231.05
  4. Step 4: Simplify right side
    417.58x = 133,142.56
  5. Step 5: Solve for x
    x = 133,142.56/417.58
  6. Step 6: Final answer
    x = 318.84

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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.