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Finding the Fourth Proportional to 326.92, 451.63 and 215.15

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Solution

The fourth proportional to 326.92, 451.63 and 215.15 is: 297.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.92 : 451.63 = 215.15 : x
  2. Step 2: Convert to fraction form
    326.92/451.63 = 215.15/x
  3. Step 3: Cross multiply
    326.92x = 451.63 × 215.15
  4. Step 4: Simplify right side
    326.92x = 97,165.94
  5. Step 5: Solve for x
    x = 97,165.94/326.92
  6. Step 6: Final answer
    x = 297.22

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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.