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Finding the Fourth Proportional to 2,099.86, 3,149.70 and 539.86

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Solution

The fourth proportional to 2,099.86, 3,149.70 and 539.86 is: 809.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,099.86 : 3,149.70 = 539.86 : x
  2. Step 2: Convert to fraction form
    2,099.86/3,149.70 = 539.86/x
  3. Step 3: Cross multiply
    2,099.86x = 3,149.70 × 539.86
  4. Step 4: Simplify right side
    2,099.86x = 1,700,397.04
  5. Step 5: Solve for x
    x = 1,700,397.04/2,099.86
  6. Step 6: Final answer
    x = 809.77

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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.