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Finding the Fourth Proportional to 326.75, 451.21 and 210.51

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Solution

The fourth proportional to 326.75, 451.21 and 210.51 is: 290.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.75 : 451.21 = 210.51 : x
  2. Step 2: Convert to fraction form
    326.75/451.21 = 210.51/x
  3. Step 3: Cross multiply
    326.75x = 451.21 × 210.51
  4. Step 4: Simplify right side
    326.75x = 94,984.22
  5. Step 5: Solve for x
    x = 94,984.22/326.75
  6. Step 6: Final answer
    x = 290.70

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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.