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Finding the Fourth Proportional to 800.61, 1,104.85 and 451.30

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Solution

The fourth proportional to 800.61, 1,104.85 and 451.30 is: 622.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.61 : 1,104.85 = 451.30 : x
  2. Step 2: Convert to fraction form
    800.61/1,104.85 = 451.30/x
  3. Step 3: Cross multiply
    800.61x = 1,104.85 × 451.30
  4. Step 4: Simplify right side
    800.61x = 498,618.81
  5. Step 5: Solve for x
    x = 498,618.81/800.61
  6. Step 6: Final answer
    x = 622.80

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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.