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Finding the Fourth Proportional to 321.63, 443.77 and 247.02

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Solution

The fourth proportional to 321.63, 443.77 and 247.02 is: 340.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.63 : 443.77 = 247.02 : x
  2. Step 2: Convert to fraction form
    321.63/443.77 = 247.02/x
  3. Step 3: Cross multiply
    321.63x = 443.77 × 247.02
  4. Step 4: Simplify right side
    321.63x = 109,620.07
  5. Step 5: Solve for x
    x = 109,620.07/321.63
  6. Step 6: Final answer
    x = 340.83

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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.