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Finding the Fourth Proportional to 326.99, 490.76 and 288.56

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Solution

The fourth proportional to 326.99, 490.76 and 288.56 is: 433.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.99 : 490.76 = 288.56 : x
  2. Step 2: Convert to fraction form
    326.99/490.76 = 288.56/x
  3. Step 3: Cross multiply
    326.99x = 490.76 × 288.56
  4. Step 4: Simplify right side
    326.99x = 141,614.57
  5. Step 5: Solve for x
    x = 141,614.57/326.99
  6. Step 6: Final answer
    x = 433.09

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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.