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Finding the Fourth Proportional to 319.60, 441.35 and 254.58

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Solution

The fourth proportional to 319.60, 441.35 and 254.58 is: 351.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.60 : 441.35 = 254.58 : x
  2. Step 2: Convert to fraction form
    319.60/441.35 = 254.58/x
  3. Step 3: Cross multiply
    319.60x = 441.35 × 254.58
  4. Step 4: Simplify right side
    319.60x = 112,358.88
  5. Step 5: Solve for x
    x = 112,358.88/319.60
  6. Step 6: Final answer
    x = 351.56

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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.