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Finding the Fourth Proportional to 662.03, 994.08 and 431.47

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Solution

The fourth proportional to 662.03, 994.08 and 431.47 is: 647.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.03 : 994.08 = 431.47 : x
  2. Step 2: Convert to fraction form
    662.03/994.08 = 431.47/x
  3. Step 3: Cross multiply
    662.03x = 994.08 × 431.47
  4. Step 4: Simplify right side
    662.03x = 428,910.73
  5. Step 5: Solve for x
    x = 428,910.73/662.03
  6. Step 6: Final answer
    x = 647.88

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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.