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Finding the Fourth Proportional to 228.51, 342.75 and 113.09

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Solution

The fourth proportional to 228.51, 342.75 and 113.09 is: 169.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.51 : 342.75 = 113.09 : x
  2. Step 2: Convert to fraction form
    228.51/342.75 = 113.09/x
  3. Step 3: Cross multiply
    228.51x = 342.75 × 113.09
  4. Step 4: Simplify right side
    228.51x = 38,759.88
  5. Step 5: Solve for x
    x = 38,759.88/228.51
  6. Step 6: Final answer
    x = 169.62

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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.