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Finding the Fourth Proportional to 548.20, 755.94 and 392.68

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Solution

The fourth proportional to 548.20, 755.94 and 392.68 is: 541.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.20 : 755.94 = 392.68 : x
  2. Step 2: Convert to fraction form
    548.20/755.94 = 392.68/x
  3. Step 3: Cross multiply
    548.20x = 755.94 × 392.68
  4. Step 4: Simplify right side
    548.20x = 296,842.52
  5. Step 5: Solve for x
    x = 296,842.52/548.20
  6. Step 6: Final answer
    x = 541.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.