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Finding the Fourth Proportional to 799.43, 1,103.16 and 445.40

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Solution

The fourth proportional to 799.43, 1,103.16 and 445.40 is: 614.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.43 : 1,103.16 = 445.40 : x
  2. Step 2: Convert to fraction form
    799.43/1,103.16 = 445.40/x
  3. Step 3: Cross multiply
    799.43x = 1,103.16 × 445.40
  4. Step 4: Simplify right side
    799.43x = 491,347.46
  5. Step 5: Solve for x
    x = 491,347.46/799.43
  6. Step 6: Final answer
    x = 614.62

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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.