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Finding the Fourth Proportional to 3,486.92, 5,230.74 and 1,540.40

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Solution

The fourth proportional to 3,486.92, 5,230.74 and 1,540.40 is: 2,310.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.92 : 5,230.74 = 1,540.40 : x
  2. Step 2: Convert to fraction form
    3,486.92/5,230.74 = 1,540.40/x
  3. Step 3: Cross multiply
    3,486.92x = 5,230.74 × 1,540.40
  4. Step 4: Simplify right side
    3,486.92x = 8,057,431.90
  5. Step 5: Solve for x
    x = 8,057,431.90/3,486.92
  6. Step 6: Final answer
    x = 2,310.76

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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.