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Finding the Fourth Proportional to 321.34, 443.64 and 247.51

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Solution

The fourth proportional to 321.34, 443.64 and 247.51 is: 341.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.34 : 443.64 = 247.51 : x
  2. Step 2: Convert to fraction form
    321.34/443.64 = 247.51/x
  3. Step 3: Cross multiply
    321.34x = 443.64 × 247.51
  4. Step 4: Simplify right side
    321.34x = 109,805.34
  5. Step 5: Solve for x
    x = 109,805.34/321.34
  6. Step 6: Final answer
    x = 341.72

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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.