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Finding the Fourth Proportional to 294.24, 406.08 and 220.80

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Solution

The fourth proportional to 294.24, 406.08 and 220.80 is: 304.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.24 : 406.08 = 220.80 : x
  2. Step 2: Convert to fraction form
    294.24/406.08 = 220.80/x
  3. Step 3: Cross multiply
    294.24x = 406.08 × 220.80
  4. Step 4: Simplify right side
    294.24x = 89,662.46
  5. Step 5: Solve for x
    x = 89,662.46/294.24
  6. Step 6: Final answer
    x = 304.73

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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.