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Finding the Fourth Proportional to 262.63, 391.89 and 235.30

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Solution

The fourth proportional to 262.63, 391.89 and 235.30 is: 351.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.63 : 391.89 = 235.30 : x
  2. Step 2: Convert to fraction form
    262.63/391.89 = 235.30/x
  3. Step 3: Cross multiply
    262.63x = 391.89 × 235.30
  4. Step 4: Simplify right side
    262.63x = 92,212.31
  5. Step 5: Solve for x
    x = 92,212.31/262.63
  6. Step 6: Final answer
    x = 351.11

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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.