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Finding the Fourth Proportional to 799.21, 1,102.92 and 445.10

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Solution

The fourth proportional to 799.21, 1,102.92 and 445.10 is: 614.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.21 : 1,102.92 = 445.10 : x
  2. Step 2: Convert to fraction form
    799.21/1,102.92 = 445.10/x
  3. Step 3: Cross multiply
    799.21x = 1,102.92 × 445.10
  4. Step 4: Simplify right side
    799.21x = 490,909.69
  5. Step 5: Solve for x
    x = 490,909.69/799.21
  6. Step 6: Final answer
    x = 614.24

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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.