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Finding the Fourth Proportional to 806.44, 1,207.50 and 663.88

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Solution

The fourth proportional to 806.44, 1,207.50 and 663.88 is: 994.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.44 : 1,207.50 = 663.88 : x
  2. Step 2: Convert to fraction form
    806.44/1,207.50 = 663.88/x
  3. Step 3: Cross multiply
    806.44x = 1,207.50 × 663.88
  4. Step 4: Simplify right side
    806.44x = 801,635.10
  5. Step 5: Solve for x
    x = 801,635.10/806.44
  6. Step 6: Final answer
    x = 994.04

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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.