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Finding the Fourth Proportional to 231.91, 317.71 and 223.13

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Solution

The fourth proportional to 231.91, 317.71 and 223.13 is: 305.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.91 : 317.71 = 223.13 : x
  2. Step 2: Convert to fraction form
    231.91/317.71 = 223.13/x
  3. Step 3: Cross multiply
    231.91x = 317.71 × 223.13
  4. Step 4: Simplify right side
    231.91x = 70,891.15
  5. Step 5: Solve for x
    x = 70,891.15/231.91
  6. Step 6: Final answer
    x = 305.69

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.