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Finding the Fourth Proportional to 325.12, 448.80 and 208.72

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Solution

The fourth proportional to 325.12, 448.80 and 208.72 is: 288.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.12 : 448.80 = 208.72 : x
  2. Step 2: Convert to fraction form
    325.12/448.80 = 208.72/x
  3. Step 3: Cross multiply
    325.12x = 448.80 × 208.72
  4. Step 4: Simplify right side
    325.12x = 93,673.54
  5. Step 5: Solve for x
    x = 93,673.54/325.12
  6. Step 6: Final answer
    x = 288.12

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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.