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Finding the Fourth Proportional to 326.49, 486.71 and 321.50

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Solution

The fourth proportional to 326.49, 486.71 and 321.50 is: 479.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.49 : 486.71 = 321.50 : x
  2. Step 2: Convert to fraction form
    326.49/486.71 = 321.50/x
  3. Step 3: Cross multiply
    326.49x = 486.71 × 321.50
  4. Step 4: Simplify right side
    326.49x = 156,473.22
  5. Step 5: Solve for x
    x = 156,473.22/326.49
  6. Step 6: Final answer
    x = 479.26

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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.