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Finding the Fourth Proportional to 326.16, 449.90 and 208.08

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Solution

The fourth proportional to 326.16, 449.90 and 208.08 is: 287.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.16 : 449.90 = 208.08 : x
  2. Step 2: Convert to fraction form
    326.16/449.90 = 208.08/x
  3. Step 3: Cross multiply
    326.16x = 449.90 × 208.08
  4. Step 4: Simplify right side
    326.16x = 93,615.19
  5. Step 5: Solve for x
    x = 93,615.19/326.16
  6. Step 6: Final answer
    x = 287.02

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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.