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Finding the Fourth Proportional to 558.70, 771.39 and 348.92

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Solution

The fourth proportional to 558.70, 771.39 and 348.92 is: 481.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.70 : 771.39 = 348.92 : x
  2. Step 2: Convert to fraction form
    558.70/771.39 = 348.92/x
  3. Step 3: Cross multiply
    558.70x = 771.39 × 348.92
  4. Step 4: Simplify right side
    558.70x = 269,149.54
  5. Step 5: Solve for x
    x = 269,149.54/558.70
  6. Step 6: Final answer
    x = 481.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.