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Finding the Fourth Proportional to 801.60, 1,104.16 and 617.28

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Solution

The fourth proportional to 801.60, 1,104.16 and 617.28 is: 850.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.60 : 1,104.16 = 617.28 : x
  2. Step 2: Convert to fraction form
    801.60/1,104.16 = 617.28/x
  3. Step 3: Cross multiply
    801.60x = 1,104.16 × 617.28
  4. Step 4: Simplify right side
    801.60x = 681,575.88
  5. Step 5: Solve for x
    x = 681,575.88/801.60
  6. Step 6: Final answer
    x = 850.27

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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.