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Finding the Fourth Proportional to 231.24, 347.40 and 135.12

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Solution

The fourth proportional to 231.24, 347.40 and 135.12 is: 203.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.24 : 347.40 = 135.12 : x
  2. Step 2: Convert to fraction form
    231.24/347.40 = 135.12/x
  3. Step 3: Cross multiply
    231.24x = 347.40 × 135.12
  4. Step 4: Simplify right side
    231.24x = 46,940.69
  5. Step 5: Solve for x
    x = 46,940.69/231.24
  6. Step 6: Final answer
    x = 203.00

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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.