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Finding the Fourth Proportional to 263.28, 397.38 and 263.28

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Solution

The fourth proportional to 263.28, 397.38 and 263.28 is: 397.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.28 : 397.38 = 263.28 : x
  2. Step 2: Convert to fraction form
    263.28/397.38 = 263.28/x
  3. Step 3: Cross multiply
    263.28x = 397.38 × 263.28
  4. Step 4: Simplify right side
    263.28x = 104,622.21
  5. Step 5: Solve for x
    x = 104,622.21/263.28
  6. Step 6: Final answer
    x = 397.38

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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.