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Finding the Fourth Proportional to 259.31, 388.41 and 122.27

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Solution

The fourth proportional to 259.31, 388.41 and 122.27 is: 183.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.31 : 388.41 = 122.27 : x
  2. Step 2: Convert to fraction form
    259.31/388.41 = 122.27/x
  3. Step 3: Cross multiply
    259.31x = 388.41 × 122.27
  4. Step 4: Simplify right side
    259.31x = 47,488.95
  5. Step 5: Solve for x
    x = 47,488.95/259.31
  6. Step 6: Final answer
    x = 183.14

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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.