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Finding the Fourth Proportional to 799.96, 1,103.90 and 445.90

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Solution

The fourth proportional to 799.96, 1,103.90 and 445.90 is: 615.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.96 : 1,103.90 = 445.90 : x
  2. Step 2: Convert to fraction form
    799.96/1,103.90 = 445.90/x
  3. Step 3: Cross multiply
    799.96x = 1,103.90 × 445.90
  4. Step 4: Simplify right side
    799.96x = 492,229.01
  5. Step 5: Solve for x
    x = 492,229.01/799.96
  6. Step 6: Final answer
    x = 615.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.