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Finding the Fourth Proportional to 326.59, 449.57 and 285.08

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Solution

The fourth proportional to 326.59, 449.57 and 285.08 is: 392.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.59 : 449.57 = 285.08 : x
  2. Step 2: Convert to fraction form
    326.59/449.57 = 285.08/x
  3. Step 3: Cross multiply
    326.59x = 449.57 × 285.08
  4. Step 4: Simplify right side
    326.59x = 128,159.74
  5. Step 5: Solve for x
    x = 128,159.74/326.59
  6. Step 6: Final answer
    x = 392.42

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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.