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Finding the Fourth Proportional to 800.09, 1,103.93 and 450.78

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Solution

The fourth proportional to 800.09, 1,103.93 and 450.78 is: 621.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.09 : 1,103.93 = 450.78 : x
  2. Step 2: Convert to fraction form
    800.09/1,103.93 = 450.78/x
  3. Step 3: Cross multiply
    800.09x = 1,103.93 × 450.78
  4. Step 4: Simplify right side
    800.09x = 497,621.79
  5. Step 5: Solve for x
    x = 497,621.79/800.09
  6. Step 6: Final answer
    x = 621.96

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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.