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Finding the Fourth Proportional to 225.18, 339.53 and 205.74

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Solution

The fourth proportional to 225.18, 339.53 and 205.74 is: 310.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.18 : 339.53 = 205.74 : x
  2. Step 2: Convert to fraction form
    225.18/339.53 = 205.74/x
  3. Step 3: Cross multiply
    225.18x = 339.53 × 205.74
  4. Step 4: Simplify right side
    225.18x = 69,853.87
  5. Step 5: Solve for x
    x = 69,853.87/225.18
  6. Step 6: Final answer
    x = 310.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.