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Finding the Fourth Proportional to 326.66, 448.38 and 288.99

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Solution

The fourth proportional to 326.66, 448.38 and 288.99 is: 396.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.66 : 448.38 = 288.99 : x
  2. Step 2: Convert to fraction form
    326.66/448.38 = 288.99/x
  3. Step 3: Cross multiply
    326.66x = 448.38 × 288.99
  4. Step 4: Simplify right side
    326.66x = 129,577.34
  5. Step 5: Solve for x
    x = 129,577.34/326.66
  6. Step 6: Final answer
    x = 396.68

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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.