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Finding the Fourth Proportional to 326.88, 492.20 and 272.51

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Solution

The fourth proportional to 326.88, 492.20 and 272.51 is: 410.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.88 : 492.20 = 272.51 : x
  2. Step 2: Convert to fraction form
    326.88/492.20 = 272.51/x
  3. Step 3: Cross multiply
    326.88x = 492.20 × 272.51
  4. Step 4: Simplify right side
    326.88x = 134,125.60
  5. Step 5: Solve for x
    x = 134,125.60/326.88
  6. Step 6: Final answer
    x = 410.32

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.