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Finding the Fourth Proportional to 558.29, 836.79 and 211.41

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Solution

The fourth proportional to 558.29, 836.79 and 211.41 is: 316.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.29 : 836.79 = 211.41 : x
  2. Step 2: Convert to fraction form
    558.29/836.79 = 211.41/x
  3. Step 3: Cross multiply
    558.29x = 836.79 × 211.41
  4. Step 4: Simplify right side
    558.29x = 176,901.59
  5. Step 5: Solve for x
    x = 176,901.59/558.29
  6. Step 6: Final answer
    x = 316.86

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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.