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Finding the Fourth Proportional to 326.10, 448.99 and 288.72

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Solution

The fourth proportional to 326.10, 448.99 and 288.72 is: 397.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.10 : 448.99 = 288.72 : x
  2. Step 2: Convert to fraction form
    326.10/448.99 = 288.72/x
  3. Step 3: Cross multiply
    326.10x = 448.99 × 288.72
  4. Step 4: Simplify right side
    326.10x = 129,632.39
  5. Step 5: Solve for x
    x = 129,632.39/326.10
  6. Step 6: Final answer
    x = 397.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.