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Finding the Fourth Proportional to 210.44, 315.74 and 94.85

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Solution

The fourth proportional to 210.44, 315.74 and 94.85 is: 142.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.44 : 315.74 = 94.85 : x
  2. Step 2: Convert to fraction form
    210.44/315.74 = 94.85/x
  3. Step 3: Cross multiply
    210.44x = 315.74 × 94.85
  4. Step 4: Simplify right side
    210.44x = 29,947.94
  5. Step 5: Solve for x
    x = 29,947.94/210.44
  6. Step 6: Final answer
    x = 142.31

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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.