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Finding the Fourth Proportional to 259.17, 388.74 and 122.34

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Solution

The fourth proportional to 259.17, 388.74 and 122.34 is: 183.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.17 : 388.74 = 122.34 : x
  2. Step 2: Convert to fraction form
    259.17/388.74 = 122.34/x
  3. Step 3: Cross multiply
    259.17x = 388.74 × 122.34
  4. Step 4: Simplify right side
    259.17x = 47,558.45
  5. Step 5: Solve for x
    x = 47,558.45/259.17
  6. Step 6: Final answer
    x = 183.50

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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.