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Finding the Fourth Proportional to 320.48, 440.66 and 273.66

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Solution

The fourth proportional to 320.48, 440.66 and 273.66 is: 376.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.48 : 440.66 = 273.66 : x
  2. Step 2: Convert to fraction form
    320.48/440.66 = 273.66/x
  3. Step 3: Cross multiply
    320.48x = 440.66 × 273.66
  4. Step 4: Simplify right side
    320.48x = 120,591.02
  5. Step 5: Solve for x
    x = 120,591.02/320.48
  6. Step 6: Final answer
    x = 376.28

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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.