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Finding the Fourth Proportional to 3,905.92, 5,857.56 and 2,987.44

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Solution

The fourth proportional to 3,905.92, 5,857.56 and 2,987.44 is: 4,480.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.92 : 5,857.56 = 2,987.44 : x
  2. Step 2: Convert to fraction form
    3,905.92/5,857.56 = 2,987.44/x
  3. Step 3: Cross multiply
    3,905.92x = 5,857.56 × 2,987.44
  4. Step 4: Simplify right side
    3,905.92x = 17,499,109.05
  5. Step 5: Solve for x
    x = 17,499,109.05/3,905.92
  6. Step 6: Final answer
    x = 4,480.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.