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Finding the Fourth Proportional to 313.67, 469.89 and 231.25

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Solution

The fourth proportional to 313.67, 469.89 and 231.25 is: 346.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.67 : 469.89 = 231.25 : x
  2. Step 2: Convert to fraction form
    313.67/469.89 = 231.25/x
  3. Step 3: Cross multiply
    313.67x = 469.89 × 231.25
  4. Step 4: Simplify right side
    313.67x = 108,662.06
  5. Step 5: Solve for x
    x = 108,662.06/313.67
  6. Step 6: Final answer
    x = 346.43

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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.