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Finding the Fourth Proportional to 321.76, 443.27 and 266.32

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Solution

The fourth proportional to 321.76, 443.27 and 266.32 is: 366.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.76 : 443.27 = 266.32 : x
  2. Step 2: Convert to fraction form
    321.76/443.27 = 266.32/x
  3. Step 3: Cross multiply
    321.76x = 443.27 × 266.32
  4. Step 4: Simplify right side
    321.76x = 118,052.89
  5. Step 5: Solve for x
    x = 118,052.89/321.76
  6. Step 6: Final answer
    x = 366.90

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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.