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Finding the Fourth Proportional to 210.28, 315.12 and 94.68

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Solution

The fourth proportional to 210.28, 315.12 and 94.68 is: 141.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.28 : 315.12 = 94.68 : x
  2. Step 2: Convert to fraction form
    210.28/315.12 = 94.68/x
  3. Step 3: Cross multiply
    210.28x = 315.12 × 94.68
  4. Step 4: Simplify right side
    210.28x = 29,835.56
  5. Step 5: Solve for x
    x = 29,835.56/210.28
  6. Step 6: Final answer
    x = 141.88

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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.