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Finding the Fourth Proportional to 3,418.86, 4,719.20 and 2,003

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Solution

The fourth proportional to 3,418.86, 4,719.20 and 2,003 is: 2,764.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,418.86 : 4,719.20 = 2,003 : x
  2. Step 2: Convert to fraction form
    3,418.86/4,719.20 = 2,003/x
  3. Step 3: Cross multiply
    3,418.86x = 4,719.20 × 2,003
  4. Step 4: Simplify right side
    3,418.86x = 9,452,557.60
  5. Step 5: Solve for x
    x = 9,452,557.60/3,418.86
  6. Step 6: Final answer
    x = 2,764.83

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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.