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Finding the Fourth Proportional to 800.70, 1,105.02 and 451.32

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Solution

The fourth proportional to 800.70, 1,105.02 and 451.32 is: 622.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.70 : 1,105.02 = 451.32 : x
  2. Step 2: Convert to fraction form
    800.70/1,105.02 = 451.32/x
  3. Step 3: Cross multiply
    800.70x = 1,105.02 × 451.32
  4. Step 4: Simplify right side
    800.70x = 498,717.63
  5. Step 5: Solve for x
    x = 498,717.63/800.70
  6. Step 6: Final answer
    x = 622.85

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Double scale
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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.