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Finding the Fourth Proportional to 246.48, 369.64 and 81.91

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Solution

The fourth proportional to 246.48, 369.64 and 81.91 is: 122.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.48 : 369.64 = 81.91 : x
  2. Step 2: Convert to fraction form
    246.48/369.64 = 81.91/x
  3. Step 3: Cross multiply
    246.48x = 369.64 × 81.91
  4. Step 4: Simplify right side
    246.48x = 30,277.21
  5. Step 5: Solve for x
    x = 30,277.21/246.48
  6. Step 6: Final answer
    x = 122.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.