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Finding the Fourth Proportional to 326.45, 449.19 and 319.16

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Solution

The fourth proportional to 326.45, 449.19 and 319.16 is: 439.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.45 : 449.19 = 319.16 : x
  2. Step 2: Convert to fraction form
    326.45/449.19 = 319.16/x
  3. Step 3: Cross multiply
    326.45x = 449.19 × 319.16
  4. Step 4: Simplify right side
    326.45x = 143,363.48
  5. Step 5: Solve for x
    x = 143,363.48/326.45
  6. Step 6: Final answer
    x = 439.16

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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.