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Finding the Fourth Proportional to 205.68, 309.72 and 173.46

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Solution

The fourth proportional to 205.68, 309.72 and 173.46 is: 261.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.68 : 309.72 = 173.46 : x
  2. Step 2: Convert to fraction form
    205.68/309.72 = 173.46/x
  3. Step 3: Cross multiply
    205.68x = 309.72 × 173.46
  4. Step 4: Simplify right side
    205.68x = 53,724.03
  5. Step 5: Solve for x
    x = 53,724.03/205.68
  6. Step 6: Final answer
    x = 261.20

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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.