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Finding the Fourth Proportional to 3,689.44, 5,091.27 and 2,117.44

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Solution

The fourth proportional to 3,689.44, 5,091.27 and 2,117.44 is: 2,921.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,689.44 : 5,091.27 = 2,117.44 : x
  2. Step 2: Convert to fraction form
    3,689.44/5,091.27 = 2,117.44/x
  3. Step 3: Cross multiply
    3,689.44x = 5,091.27 × 2,117.44
  4. Step 4: Simplify right side
    3,689.44x = 10,780,458.75
  5. Step 5: Solve for x
    x = 10,780,458.75/3,689.44
  6. Step 6: Final answer
    x = 2,921.98

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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.