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Finding the Fourth Proportional to 321.54, 482.73 and 205.67

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Solution

The fourth proportional to 321.54, 482.73 and 205.67 is: 308.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.54 : 482.73 = 205.67 : x
  2. Step 2: Convert to fraction form
    321.54/482.73 = 205.67/x
  3. Step 3: Cross multiply
    321.54x = 482.73 × 205.67
  4. Step 4: Simplify right side
    321.54x = 99,283.51
  5. Step 5: Solve for x
    x = 99,283.51/321.54
  6. Step 6: Final answer
    x = 308.78

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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.