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Finding the Fourth Proportional to 800.10, 1,104.15 and 450.81

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Solution

The fourth proportional to 800.10, 1,104.15 and 450.81 is: 622.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.10 : 1,104.15 = 450.81 : x
  2. Step 2: Convert to fraction form
    800.10/1,104.15 = 450.81/x
  3. Step 3: Cross multiply
    800.10x = 1,104.15 × 450.81
  4. Step 4: Simplify right side
    800.10x = 497,761.86
  5. Step 5: Solve for x
    x = 497,761.86/800.10
  6. Step 6: Final answer
    x = 622.12

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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.