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Finding the Fourth Proportional to 310.15, 427.93 and 205.39

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Solution

The fourth proportional to 310.15, 427.93 and 205.39 is: 283.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.15 : 427.93 = 205.39 : x
  2. Step 2: Convert to fraction form
    310.15/427.93 = 205.39/x
  3. Step 3: Cross multiply
    310.15x = 427.93 × 205.39
  4. Step 4: Simplify right side
    310.15x = 87,892.54
  5. Step 5: Solve for x
    x = 87,892.54/310.15
  6. Step 6: Final answer
    x = 283.39

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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.