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Finding the Fourth Proportional to 386.96, 533.76 and 254.19

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Solution

The fourth proportional to 386.96, 533.76 and 254.19 is: 350.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.96 : 533.76 = 254.19 : x
  2. Step 2: Convert to fraction form
    386.96/533.76 = 254.19/x
  3. Step 3: Cross multiply
    386.96x = 533.76 × 254.19
  4. Step 4: Simplify right side
    386.96x = 135,672.51
  5. Step 5: Solve for x
    x = 135,672.51/386.96
  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.