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Finding the Fourth Proportional to 262.64, 362.75 and 220.78

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Solution

The fourth proportional to 262.64, 362.75 and 220.78 is: 304.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.64 : 362.75 = 220.78 : x
  2. Step 2: Convert to fraction form
    262.64/362.75 = 220.78/x
  3. Step 3: Cross multiply
    262.64x = 362.75 × 220.78
  4. Step 4: Simplify right side
    262.64x = 80,087.95
  5. Step 5: Solve for x
    x = 80,087.95/262.64
  6. Step 6: Final answer
    x = 304.93

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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.