Home / 3,131.25-4,697.16-822.75

Finding the Fourth Proportional to 3,131.25, 4,697.16 and 822.75

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Solution

The fourth proportional to 3,131.25, 4,697.16 and 822.75 is: 1,234.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.25 : 4,697.16 = 822.75 : x
  2. Step 2: Convert to fraction form
    3,131.25/4,697.16 = 822.75/x
  3. Step 3: Cross multiply
    3,131.25x = 4,697.16 × 822.75
  4. Step 4: Simplify right side
    3,131.25x = 3,864,588.39
  5. Step 5: Solve for x
    x = 3,864,588.39/3,131.25
  6. Step 6: Final answer
    x = 1,234.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.