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Finding the Fourth Proportional to 246.48, 369.80 and 138.20

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Solution

The fourth proportional to 246.48, 369.80 and 138.20 is: 207.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    246.48 : 369.80 = 138.20 : x
  2. Step 2: Convert to fraction form
    246.48/369.80 = 138.20/x
  3. Step 3: Cross multiply
    246.48x = 369.80 × 138.20
  4. Step 4: Simplify right side
    246.48x = 51,103.82
  5. Step 5: Solve for x
    x = 51,103.82/246.48
  6. Step 6: Final answer
    x = 207.33

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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.