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Finding the Fourth Proportional to 210.67, 316.07 and 169.49

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Solution

The fourth proportional to 210.67, 316.07 and 169.49 is: 254.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.67 : 316.07 = 169.49 : x
  2. Step 2: Convert to fraction form
    210.67/316.07 = 169.49/x
  3. Step 3: Cross multiply
    210.67x = 316.07 × 169.49
  4. Step 4: Simplify right side
    210.67x = 53,571.28
  5. Step 5: Solve for x
    x = 53,571.28/210.67
  6. Step 6: Final answer
    x = 254.29

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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.