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Finding the Fourth Proportional to 422.53, 633.79 and 148.81

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Solution

The fourth proportional to 422.53, 633.79 and 148.81 is: 223.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.53 : 633.79 = 148.81 : x
  2. Step 2: Convert to fraction form
    422.53/633.79 = 148.81/x
  3. Step 3: Cross multiply
    422.53x = 633.79 × 148.81
  4. Step 4: Simplify right side
    422.53x = 94,314.29
  5. Step 5: Solve for x
    x = 94,314.29/422.53
  6. Step 6: Final answer
    x = 223.21

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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.