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Finding the Fourth Proportional to 2,764.31, 3,813.53 and 1,818.88

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Solution

The fourth proportional to 2,764.31, 3,813.53 and 1,818.88 is: 2,509.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,764.31 : 3,813.53 = 1,818.88 : x
  2. Step 2: Convert to fraction form
    2,764.31/3,813.53 = 1,818.88/x
  3. Step 3: Cross multiply
    2,764.31x = 3,813.53 × 1,818.88
  4. Step 4: Simplify right side
    2,764.31x = 6,936,353.45
  5. Step 5: Solve for x
    x = 6,936,353.45/2,764.31
  6. Step 6: Final answer
    x = 2,509.26

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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.