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Finding the Fourth Proportional to 225.13, 336.87 and 138.16

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Solution

The fourth proportional to 225.13, 336.87 and 138.16 is: 206.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.13 : 336.87 = 138.16 : x
  2. Step 2: Convert to fraction form
    225.13/336.87 = 138.16/x
  3. Step 3: Cross multiply
    225.13x = 336.87 × 138.16
  4. Step 4: Simplify right side
    225.13x = 46,541.96
  5. Step 5: Solve for x
    x = 46,541.96/225.13
  6. Step 6: Final answer
    x = 206.73

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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.