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Finding the Fourth Proportional to 262.88, 395.88 and 219.96

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Solution

The fourth proportional to 262.88, 395.88 and 219.96 is: 331.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.88 : 395.88 = 219.96 : x
  2. Step 2: Convert to fraction form
    262.88/395.88 = 219.96/x
  3. Step 3: Cross multiply
    262.88x = 395.88 × 219.96
  4. Step 4: Simplify right side
    262.88x = 87,077.76
  5. Step 5: Solve for x
    x = 87,077.76/262.88
  6. Step 6: Final answer
    x = 331.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.