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Finding the Fourth Proportional to 210.77, 315.21 and 161.37

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Solution

The fourth proportional to 210.77, 315.21 and 161.37 is: 241.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.77 : 315.21 = 161.37 : x
  2. Step 2: Convert to fraction form
    210.77/315.21 = 161.37/x
  3. Step 3: Cross multiply
    210.77x = 315.21 × 161.37
  4. Step 4: Simplify right side
    210.77x = 50,864.63
  5. Step 5: Solve for x
    x = 50,864.63/210.77
  6. Step 6: Final answer
    x = 241.33

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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.