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Finding the Fourth Proportional to 799.63, 1,103.53 and 450.31

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Solution

The fourth proportional to 799.63, 1,103.53 and 450.31 is: 621.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.63 : 1,103.53 = 450.31 : x
  2. Step 2: Convert to fraction form
    799.63/1,103.53 = 450.31/x
  3. Step 3: Cross multiply
    799.63x = 1,103.53 × 450.31
  4. Step 4: Simplify right side
    799.63x = 496,930.59
  5. Step 5: Solve for x
    x = 496,930.59/799.63
  6. Step 6: Final answer
    x = 621.45

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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.