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Finding the Fourth Proportional to 401.25, 601.31 and 225.39

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Solution

The fourth proportional to 401.25, 601.31 and 225.39 is: 337.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.25 : 601.31 = 225.39 : x
  2. Step 2: Convert to fraction form
    401.25/601.31 = 225.39/x
  3. Step 3: Cross multiply
    401.25x = 601.31 × 225.39
  4. Step 4: Simplify right side
    401.25x = 135,529.26
  5. Step 5: Solve for x
    x = 135,529.26/401.25
  6. Step 6: Final answer
    x = 337.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.