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Finding the Fourth Proportional to 254, 351.12 and 231.23

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Solution

The fourth proportional to 254, 351.12 and 231.23 is: 319.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    254 : 351.12 = 231.23 : x
  2. Step 2: Convert to fraction form
    254/351.12 = 231.23/x
  3. Step 3: Cross multiply
    254x = 351.12 × 231.23
  4. Step 4: Simplify right side
    254x = 81,189.48
  5. Step 5: Solve for x
    x = 81,189.48/254
  6. Step 6: Final answer
    x = 319.64

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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.