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Finding the Fourth Proportional to 548.64, 820.80 and 493.92

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Solution

The fourth proportional to 548.64, 820.80 and 493.92 is: 738.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.64 : 820.80 = 493.92 : x
  2. Step 2: Convert to fraction form
    548.64/820.80 = 493.92/x
  3. Step 3: Cross multiply
    548.64x = 820.80 × 493.92
  4. Step 4: Simplify right side
    548.64x = 405,409.54
  5. Step 5: Solve for x
    x = 405,409.54/548.64
  6. Step 6: Final answer
    x = 738.94

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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.