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Finding the Fourth Proportional to 231.98, 317.98 and 231.57

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Solution

The fourth proportional to 231.98, 317.98 and 231.57 is: 317.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.98 : 317.98 = 231.57 : x
  2. Step 2: Convert to fraction form
    231.98/317.98 = 231.57/x
  3. Step 3: Cross multiply
    231.98x = 317.98 × 231.57
  4. Step 4: Simplify right side
    231.98x = 73,634.63
  5. Step 5: Solve for x
    x = 73,634.63/231.98
  6. Step 6: Final answer
    x = 317.42

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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.