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Finding the Fourth Proportional to 3,323.60, 4,985.40 and 1,375.86

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Solution

The fourth proportional to 3,323.60, 4,985.40 and 1,375.86 is: 2,063.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,323.60 : 4,985.40 = 1,375.86 : x
  2. Step 2: Convert to fraction form
    3,323.60/4,985.40 = 1,375.86/x
  3. Step 3: Cross multiply
    3,323.60x = 4,985.40 × 1,375.86
  4. Step 4: Simplify right side
    3,323.60x = 6,859,212.44
  5. Step 5: Solve for x
    x = 6,859,212.44/3,323.60
  6. Step 6: Final answer
    x = 2,063.79

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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.