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Finding the Fourth Proportional to 631.33, 946.90 and 220.44

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Solution

The fourth proportional to 631.33, 946.90 and 220.44 is: 330.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.33 : 946.90 = 220.44 : x
  2. Step 2: Convert to fraction form
    631.33/946.90 = 220.44/x
  3. Step 3: Cross multiply
    631.33x = 946.90 × 220.44
  4. Step 4: Simplify right side
    631.33x = 208,734.64
  5. Step 5: Solve for x
    x = 208,734.64/631.33
  6. Step 6: Final answer
    x = 330.63

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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.