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Finding the Fourth Proportional to 628.76, 944.51 and 423.73

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Solution

The fourth proportional to 628.76, 944.51 and 423.73 is: 636.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.76 : 944.51 = 423.73 : x
  2. Step 2: Convert to fraction form
    628.76/944.51 = 423.73/x
  3. Step 3: Cross multiply
    628.76x = 944.51 × 423.73
  4. Step 4: Simplify right side
    628.76x = 400,218.67
  5. Step 5: Solve for x
    x = 400,218.67/628.76
  6. Step 6: Final answer
    x = 636.52

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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.