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Finding the Fourth Proportional to 326.39, 486.97 and 310.91

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Solution

The fourth proportional to 326.39, 486.97 and 310.91 is: 463.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.39 : 486.97 = 310.91 : x
  2. Step 2: Convert to fraction form
    326.39/486.97 = 310.91/x
  3. Step 3: Cross multiply
    326.39x = 486.97 × 310.91
  4. Step 4: Simplify right side
    326.39x = 151,400.63
  5. Step 5: Solve for x
    x = 151,400.63/326.39
  6. Step 6: Final answer
    x = 463.87

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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.