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Finding the Fourth Proportional to 326.02, 488.17 and 257.68

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Solution

The fourth proportional to 326.02, 488.17 and 257.68 is: 385.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.02 : 488.17 = 257.68 : x
  2. Step 2: Convert to fraction form
    326.02/488.17 = 257.68/x
  3. Step 3: Cross multiply
    326.02x = 488.17 × 257.68
  4. Step 4: Simplify right side
    326.02x = 125,791.65
  5. Step 5: Solve for x
    x = 125,791.65/326.02
  6. Step 6: Final answer
    x = 385.84

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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.