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Finding the Fourth Proportional to 799.32, 1,103.12 and 445.28

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Solution

The fourth proportional to 799.32, 1,103.12 and 445.28 is: 614.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.32 : 1,103.12 = 445.28 : x
  2. Step 2: Convert to fraction form
    799.32/1,103.12 = 445.28/x
  3. Step 3: Cross multiply
    799.32x = 1,103.12 × 445.28
  4. Step 4: Simplify right side
    799.32x = 491,189.53
  5. Step 5: Solve for x
    x = 491,189.53/799.32
  6. Step 6: Final answer
    x = 614.51

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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.