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Finding the Fourth Proportional to 645.37, 968.02 and 255.22

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Solution

The fourth proportional to 645.37, 968.02 and 255.22 is: 382.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.37 : 968.02 = 255.22 : x
  2. Step 2: Convert to fraction form
    645.37/968.02 = 255.22/x
  3. Step 3: Cross multiply
    645.37x = 968.02 × 255.22
  4. Step 4: Simplify right side
    645.37x = 247,055.01
  5. Step 5: Solve for x
    x = 247,055.01/645.37
  6. Step 6: Final answer
    x = 382.81

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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.