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Finding the Fourth Proportional to 294.52, 406.74 and 220.72

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Solution

The fourth proportional to 294.52, 406.74 and 220.72 is: 304.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.52 : 406.74 = 220.72 : x
  2. Step 2: Convert to fraction form
    294.52/406.74 = 220.72/x
  3. Step 3: Cross multiply
    294.52x = 406.74 × 220.72
  4. Step 4: Simplify right side
    294.52x = 89,775.65
  5. Step 5: Solve for x
    x = 89,775.65/294.52
  6. Step 6: Final answer
    x = 304.82

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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.