Home / 2,820.15-4,230.81-872.46

Finding the Fourth Proportional to 2,820.15, 4,230.81 and 872.46

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Solution

The fourth proportional to 2,820.15, 4,230.81 and 872.46 is: 1,308.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.15 : 4,230.81 = 872.46 : x
  2. Step 2: Convert to fraction form
    2,820.15/4,230.81 = 872.46/x
  3. Step 3: Cross multiply
    2,820.15x = 4,230.81 × 872.46
  4. Step 4: Simplify right side
    2,820.15x = 3,691,212.49
  5. Step 5: Solve for x
    x = 3,691,212.49/2,820.15
  6. Step 6: Final answer
    x = 1,308.87

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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.