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Finding the Fourth Proportional to 231.18, 347.01 and 216.30

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Solution

The fourth proportional to 231.18, 347.01 and 216.30 is: 324.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.18 : 347.01 = 216.30 : x
  2. Step 2: Convert to fraction form
    231.18/347.01 = 216.30/x
  3. Step 3: Cross multiply
    231.18x = 347.01 × 216.30
  4. Step 4: Simplify right side
    231.18x = 75,058.26
  5. Step 5: Solve for x
    x = 75,058.26/231.18
  6. Step 6: Final answer
    x = 324.67

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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.