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Finding the Fourth Proportional to 857.44, 1,182.36 and 636.04

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Solution

The fourth proportional to 857.44, 1,182.36 and 636.04 is: 877.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.44 : 1,182.36 = 636.04 : x
  2. Step 2: Convert to fraction form
    857.44/1,182.36 = 636.04/x
  3. Step 3: Cross multiply
    857.44x = 1,182.36 × 636.04
  4. Step 4: Simplify right side
    857.44x = 752,028.25
  5. Step 5: Solve for x
    x = 752,028.25/857.44
  6. Step 6: Final answer
    x = 877.06

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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.