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Finding the Fourth Proportional to 326.86, 451.11 and 210.76

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Solution

The fourth proportional to 326.86, 451.11 and 210.76 is: 290.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.86 : 451.11 = 210.76 : x
  2. Step 2: Convert to fraction form
    326.86/451.11 = 210.76/x
  3. Step 3: Cross multiply
    326.86x = 451.11 × 210.76
  4. Step 4: Simplify right side
    326.86x = 95,075.94
  5. Step 5: Solve for x
    x = 95,075.94/326.86
  6. Step 6: Final answer
    x = 290.88

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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.