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Finding the Fourth Proportional to 3,917.98, 5,407.02 and 2,149.58

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Solution

The fourth proportional to 3,917.98, 5,407.02 and 2,149.58 is: 2,966.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.98 : 5,407.02 = 2,149.58 : x
  2. Step 2: Convert to fraction form
    3,917.98/5,407.02 = 2,149.58/x
  3. Step 3: Cross multiply
    3,917.98x = 5,407.02 × 2,149.58
  4. Step 4: Simplify right side
    3,917.98x = 11,622,822.70
  5. Step 5: Solve for x
    x = 11,622,822.70/3,917.98
  6. Step 6: Final answer
    x = 2,966.54

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1.5x scale

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.