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Finding the Fourth Proportional to 262.72, 391.73 and 262.36

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Solution

The fourth proportional to 262.72, 391.73 and 262.36 is: 391.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.72 : 391.73 = 262.36 : x
  2. Step 2: Convert to fraction form
    262.72/391.73 = 262.36/x
  3. Step 3: Cross multiply
    262.72x = 391.73 × 262.36
  4. Step 4: Simplify right side
    262.72x = 102,774.28
  5. Step 5: Solve for x
    x = 102,774.28/262.72
  6. Step 6: Final answer
    x = 391.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.