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Finding the Fourth Proportional to 326.08, 488.90 and 171.84

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Solution

The fourth proportional to 326.08, 488.90 and 171.84 is: 257.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.08 : 488.90 = 171.84 : x
  2. Step 2: Convert to fraction form
    326.08/488.90 = 171.84/x
  3. Step 3: Cross multiply
    326.08x = 488.90 × 171.84
  4. Step 4: Simplify right side
    326.08x = 84,011.72
  5. Step 5: Solve for x
    x = 84,011.72/326.08
  6. Step 6: Final answer
    x = 257.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.