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Finding the Fourth Proportional to 800.94, 1,105.20 and 451.56

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Solution

The fourth proportional to 800.94, 1,105.20 and 451.56 is: 623.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.94 : 1,105.20 = 451.56 : x
  2. Step 2: Convert to fraction form
    800.94/1,105.20 = 451.56/x
  3. Step 3: Cross multiply
    800.94x = 1,105.20 × 451.56
  4. Step 4: Simplify right side
    800.94x = 499,064.11
  5. Step 5: Solve for x
    x = 499,064.11/800.94
  6. Step 6: Final answer
    x = 623.10

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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.