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Finding the Fourth Proportional to 2,893.56, 3,990.65 and 2,011.47

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Solution

The fourth proportional to 2,893.56, 3,990.65 and 2,011.47 is: 2,774.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,893.56 : 3,990.65 = 2,011.47 : x
  2. Step 2: Convert to fraction form
    2,893.56/3,990.65 = 2,011.47/x
  3. Step 3: Cross multiply
    2,893.56x = 3,990.65 × 2,011.47
  4. Step 4: Simplify right side
    2,893.56x = 8,027,062.70
  5. Step 5: Solve for x
    x = 8,027,062.70/2,893.56
  6. Step 6: Final answer
    x = 2,774.11

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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.