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Finding the Fourth Proportional to 326.01, 488.57 and 257.22

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Solution

The fourth proportional to 326.01, 488.57 and 257.22 is: 385.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.01 : 488.57 = 257.22 : x
  2. Step 2: Convert to fraction form
    326.01/488.57 = 257.22/x
  3. Step 3: Cross multiply
    326.01x = 488.57 × 257.22
  4. Step 4: Simplify right side
    326.01x = 125,668.69
  5. Step 5: Solve for x
    x = 125,668.69/326.01
  6. Step 6: Final answer
    x = 385.47

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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.