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Finding the Fourth Proportional to 325.12, 486.72 and 247.84

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Solution

The fourth proportional to 325.12, 486.72 and 247.84 is: 371.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.12 : 486.72 = 247.84 : x
  2. Step 2: Convert to fraction form
    325.12/486.72 = 247.84/x
  3. Step 3: Cross multiply
    325.12x = 486.72 × 247.84
  4. Step 4: Simplify right side
    325.12x = 120,628.68
  5. Step 5: Solve for x
    x = 120,628.68/325.12
  6. Step 6: Final answer
    x = 371.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.