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Finding the Fourth Proportional to 310.10, 427.20 and 254.51

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Solution

The fourth proportional to 310.10, 427.20 and 254.51 is: 350.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.10 : 427.20 = 254.51 : x
  2. Step 2: Convert to fraction form
    310.10/427.20 = 254.51/x
  3. Step 3: Cross multiply
    310.10x = 427.20 × 254.51
  4. Step 4: Simplify right side
    310.10x = 108,724.54
  5. Step 5: Solve for x
    x = 108,724.54/310.10
  6. Step 6: Final answer
    x = 350.62

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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.