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Finding the Fourth Proportional to 326.26, 487.54 and 318.97

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Solution

The fourth proportional to 326.26, 487.54 and 318.97 is: 476.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.26 : 487.54 = 318.97 : x
  2. Step 2: Convert to fraction form
    326.26/487.54 = 318.97/x
  3. Step 3: Cross multiply
    326.26x = 487.54 × 318.97
  4. Step 4: Simplify right side
    326.26x = 155,509.04
  5. Step 5: Solve for x
    x = 155,509.04/326.26
  6. Step 6: Final answer
    x = 476.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.