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Finding the Fourth Proportional to 801.44, 1,107.16 and 635.12

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Solution

The fourth proportional to 801.44, 1,107.16 and 635.12 is: 877.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.44 : 1,107.16 = 635.12 : x
  2. Step 2: Convert to fraction form
    801.44/1,107.16 = 635.12/x
  3. Step 3: Cross multiply
    801.44x = 1,107.16 × 635.12
  4. Step 4: Simplify right side
    801.44x = 703,179.46
  5. Step 5: Solve for x
    x = 703,179.46/801.44
  6. Step 6: Final answer
    x = 877.40

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Double scale
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1.5x scale

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.