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Finding the Fourth Proportional to 3,521.86, 4,859.79 and 1,949.86

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Solution

The fourth proportional to 3,521.86, 4,859.79 and 1,949.86 is: 2,690.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,521.86 : 4,859.79 = 1,949.86 : x
  2. Step 2: Convert to fraction form
    3,521.86/4,859.79 = 1,949.86/x
  3. Step 3: Cross multiply
    3,521.86x = 4,859.79 × 1,949.86
  4. Step 4: Simplify right side
    3,521.86x = 9,475,910.13
  5. Step 5: Solve for x
    x = 9,475,910.13/3,521.86
  6. Step 6: Final answer
    x = 2,690.60

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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.