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Finding the Fourth Proportional to 326.22, 486.81 and 291.62

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Solution

The fourth proportional to 326.22, 486.81 and 291.62 is: 435.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.22 : 486.81 = 291.62 : x
  2. Step 2: Convert to fraction form
    326.22/486.81 = 291.62/x
  3. Step 3: Cross multiply
    326.22x = 486.81 × 291.62
  4. Step 4: Simplify right side
    326.22x = 141,961.10
  5. Step 5: Solve for x
    x = 141,961.10/326.22
  6. Step 6: Final answer
    x = 435.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.