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Finding the Fourth Proportional to 294.38, 406.25 and 163.40

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Solution

The fourth proportional to 294.38, 406.25 and 163.40 is: 225.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.38 : 406.25 = 163.40 : x
  2. Step 2: Convert to fraction form
    294.38/406.25 = 163.40/x
  3. Step 3: Cross multiply
    294.38x = 406.25 × 163.40
  4. Step 4: Simplify right side
    294.38x = 66,381.25
  5. Step 5: Solve for x
    x = 66,381.25/294.38
  6. Step 6: Final answer
    x = 225.50

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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.