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Finding the Fourth Proportional to 665.58, 996.91 and 548.71

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Solution

The fourth proportional to 665.58, 996.91 and 548.71 is: 821.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.58 : 996.91 = 548.71 : x
  2. Step 2: Convert to fraction form
    665.58/996.91 = 548.71/x
  3. Step 3: Cross multiply
    665.58x = 996.91 × 548.71
  4. Step 4: Simplify right side
    665.58x = 547,013.41
  5. Step 5: Solve for x
    x = 547,013.41/665.58
  6. Step 6: Final answer
    x = 821.86

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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.