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Finding the Fourth Proportional to 484.22, 668.38 and 309.56

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Solution

The fourth proportional to 484.22, 668.38 and 309.56 is: 427.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.22 : 668.38 = 309.56 : x
  2. Step 2: Convert to fraction form
    484.22/668.38 = 309.56/x
  3. Step 3: Cross multiply
    484.22x = 668.38 × 309.56
  4. Step 4: Simplify right side
    484.22x = 206,904.61
  5. Step 5: Solve for x
    x = 206,904.61/484.22
  6. Step 6: Final answer
    x = 427.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.