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Finding the Fourth Proportional to 342.37, 512.61 and 220.33

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Solution

The fourth proportional to 342.37, 512.61 and 220.33 is: 329.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.37 : 512.61 = 220.33 : x
  2. Step 2: Convert to fraction form
    342.37/512.61 = 220.33/x
  3. Step 3: Cross multiply
    342.37x = 512.61 × 220.33
  4. Step 4: Simplify right side
    342.37x = 112,943.36
  5. Step 5: Solve for x
    x = 112,943.36/342.37
  6. Step 6: Final answer
    x = 329.89

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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.