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Finding the Fourth Proportional to 322.05, 444.90 and 257.25

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Solution

The fourth proportional to 322.05, 444.90 and 257.25 is: 355.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.05 : 444.90 = 257.25 : x
  2. Step 2: Convert to fraction form
    322.05/444.90 = 257.25/x
  3. Step 3: Cross multiply
    322.05x = 444.90 × 257.25
  4. Step 4: Simplify right side
    322.05x = 114,450.53
  5. Step 5: Solve for x
    x = 114,450.53/322.05
  6. Step 6: Final answer
    x = 355.38

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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.