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Finding the Fourth Proportional to 949.62, 1,424.46 and 422.58

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Solution

The fourth proportional to 949.62, 1,424.46 and 422.58 is: 633.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.62 : 1,424.46 = 422.58 : x
  2. Step 2: Convert to fraction form
    949.62/1,424.46 = 422.58/x
  3. Step 3: Cross multiply
    949.62x = 1,424.46 × 422.58
  4. Step 4: Simplify right side
    949.62x = 601,948.31
  5. Step 5: Solve for x
    x = 601,948.31/949.62
  6. Step 6: Final answer
    x = 633.88

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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.