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Finding the Fourth Proportional to 326.63, 448.45 and 318.17

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Solution

The fourth proportional to 326.63, 448.45 and 318.17 is: 436.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.63 : 448.45 = 318.17 : x
  2. Step 2: Convert to fraction form
    326.63/448.45 = 318.17/x
  3. Step 3: Cross multiply
    326.63x = 448.45 × 318.17
  4. Step 4: Simplify right side
    326.63x = 142,681.09
  5. Step 5: Solve for x
    x = 142,681.09/326.63
  6. Step 6: Final answer
    x = 436.83

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.