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Finding the Fourth Proportional to 800.42, 1,104.64 and 635.99

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Solution

The fourth proportional to 800.42, 1,104.64 and 635.99 is: 877.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.42 : 1,104.64 = 635.99 : x
  2. Step 2: Convert to fraction form
    800.42/1,104.64 = 635.99/x
  3. Step 3: Cross multiply
    800.42x = 1,104.64 × 635.99
  4. Step 4: Simplify right side
    800.42x = 702,532.88
  5. Step 5: Solve for x
    x = 702,532.88/800.42
  6. Step 6: Final answer
    x = 877.71

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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.