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Finding the Fourth Proportional to 558.75, 838.08 and 211.95

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Solution

The fourth proportional to 558.75, 838.08 and 211.95 is: 317.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.75 : 838.08 = 211.95 : x
  2. Step 2: Convert to fraction form
    558.75/838.08 = 211.95/x
  3. Step 3: Cross multiply
    558.75x = 838.08 × 211.95
  4. Step 4: Simplify right side
    558.75x = 177,631.06
  5. Step 5: Solve for x
    x = 177,631.06/558.75
  6. Step 6: Final answer
    x = 317.91

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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.