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Finding the Fourth Proportional to 800.28, 1,104.03 and 551.21

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Solution

The fourth proportional to 800.28, 1,104.03 and 551.21 is: 760.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.28 : 1,104.03 = 551.21 : x
  2. Step 2: Convert to fraction form
    800.28/1,104.03 = 551.21/x
  3. Step 3: Cross multiply
    800.28x = 1,104.03 × 551.21
  4. Step 4: Simplify right side
    800.28x = 608,546.86
  5. Step 5: Solve for x
    x = 608,546.86/800.28
  6. Step 6: Final answer
    x = 760.42

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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.