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Finding the Fourth Proportional to 321.50, 443.23 and 265.46

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Solution

The fourth proportional to 321.50, 443.23 and 265.46 is: 365.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.50 : 443.23 = 265.46 : x
  2. Step 2: Convert to fraction form
    321.50/443.23 = 265.46/x
  3. Step 3: Cross multiply
    321.50x = 443.23 × 265.46
  4. Step 4: Simplify right side
    321.50x = 117,656.96
  5. Step 5: Solve for x
    x = 117,656.96/321.50
  6. Step 6: Final answer
    x = 365.96

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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.