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Finding the Fourth Proportional to 645.93, 968.90 and 201.21

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Solution

The fourth proportional to 645.93, 968.90 and 201.21 is: 301.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.93 : 968.90 = 201.21 : x
  2. Step 2: Convert to fraction form
    645.93/968.90 = 201.21/x
  3. Step 3: Cross multiply
    645.93x = 968.90 × 201.21
  4. Step 4: Simplify right side
    645.93x = 194,948.86
  5. Step 5: Solve for x
    x = 194,948.86/645.93
  6. Step 6: Final answer
    x = 301.81

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Similar ratio
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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.