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Finding the Fourth Proportional to 422.50, 631.94 and 305.64

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Solution

The fourth proportional to 422.50, 631.94 and 305.64 is: 457.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.50 : 631.94 = 305.64 : x
  2. Step 2: Convert to fraction form
    422.50/631.94 = 305.64/x
  3. Step 3: Cross multiply
    422.50x = 631.94 × 305.64
  4. Step 4: Simplify right side
    422.50x = 193,146.14
  5. Step 5: Solve for x
    x = 193,146.14/422.50
  6. Step 6: Final answer
    x = 457.15

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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.