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Finding the Fourth Proportional to 2,810.73, 3,878.80 and 1,551.86

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Solution

The fourth proportional to 2,810.73, 3,878.80 and 1,551.86 is: 2,141.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.73 : 3,878.80 = 1,551.86 : x
  2. Step 2: Convert to fraction form
    2,810.73/3,878.80 = 1,551.86/x
  3. Step 3: Cross multiply
    2,810.73x = 3,878.80 × 1,551.86
  4. Step 4: Simplify right side
    2,810.73x = 6,019,354.57
  5. Step 5: Solve for x
    x = 6,019,354.57/2,810.73
  6. Step 6: Final answer
    x = 2,141.56

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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.