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Finding the Fourth Proportional to 320.76, 481.20 and 174.51

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Solution

The fourth proportional to 320.76, 481.20 and 174.51 is: 261.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.76 : 481.20 = 174.51 : x
  2. Step 2: Convert to fraction form
    320.76/481.20 = 174.51/x
  3. Step 3: Cross multiply
    320.76x = 481.20 × 174.51
  4. Step 4: Simplify right side
    320.76x = 83,974.21
  5. Step 5: Solve for x
    x = 83,974.21/320.76
  6. Step 6: Final answer
    x = 261.80

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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.