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Finding the Fourth Proportional to 2,464.68, 3,696.06 and 820.78

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Solution

The fourth proportional to 2,464.68, 3,696.06 and 820.78 is: 1,230.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,464.68 : 3,696.06 = 820.78 : x
  2. Step 2: Convert to fraction form
    2,464.68/3,696.06 = 820.78/x
  3. Step 3: Cross multiply
    2,464.68x = 3,696.06 × 820.78
  4. Step 4: Simplify right side
    2,464.68x = 3,033,652.13
  5. Step 5: Solve for x
    x = 3,033,652.13/2,464.68
  6. Step 6: Final answer
    x = 1,230.85

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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.