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Finding the Fourth Proportional to 3,390.56, 5,079 and 2,841.20

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Solution

The fourth proportional to 3,390.56, 5,079 and 2,841.20 is: 4,256.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.56 : 5,079 = 2,841.20 : x
  2. Step 2: Convert to fraction form
    3,390.56/5,079 = 2,841.20/x
  3. Step 3: Cross multiply
    3,390.56x = 5,079 × 2,841.20
  4. Step 4: Simplify right side
    3,390.56x = 14,430,454.80
  5. Step 5: Solve for x
    x = 14,430,454.80/3,390.56
  6. Step 6: Final answer
    x = 4,256.07

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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.