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Finding the Fourth Proportional to 558.22, 837.30 and 211.61

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Solution

The fourth proportional to 558.22, 837.30 and 211.61 is: 317.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.22 : 837.30 = 211.61 : x
  2. Step 2: Convert to fraction form
    558.22/837.30 = 211.61/x
  3. Step 3: Cross multiply
    558.22x = 837.30 × 211.61
  4. Step 4: Simplify right side
    558.22x = 177,181.05
  5. Step 5: Solve for x
    x = 177,181.05/558.22
  6. Step 6: Final answer
    x = 317.40

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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.