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Finding the Fourth Proportional to 801.56, 1,107.21 and 617.34

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Solution

The fourth proportional to 801.56, 1,107.21 and 617.34 is: 852.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.56 : 1,107.21 = 617.34 : x
  2. Step 2: Convert to fraction form
    801.56/1,107.21 = 617.34/x
  3. Step 3: Cross multiply
    801.56x = 1,107.21 × 617.34
  4. Step 4: Simplify right side
    801.56x = 683,525.02
  5. Step 5: Solve for x
    x = 683,525.02/801.56
  6. Step 6: Final answer
    x = 852.75

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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.