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Finding the Fourth Proportional to 320.06, 440.56 and 287.26

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Solution

The fourth proportional to 320.06, 440.56 and 287.26 is: 395.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.06 : 440.56 = 287.26 : x
  2. Step 2: Convert to fraction form
    320.06/440.56 = 287.26/x
  3. Step 3: Cross multiply
    320.06x = 440.56 × 287.26
  4. Step 4: Simplify right side
    320.06x = 126,555.27
  5. Step 5: Solve for x
    x = 126,555.27/320.06
  6. Step 6: Final answer
    x = 395.41

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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.