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Finding the Fourth Proportional to 3,756.92, 5,639.86 and 2,219

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Solution

The fourth proportional to 3,756.92, 5,639.86 and 2,219 is: 3,331.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,756.92 : 5,639.86 = 2,219 : x
  2. Step 2: Convert to fraction form
    3,756.92/5,639.86 = 2,219/x
  3. Step 3: Cross multiply
    3,756.92x = 5,639.86 × 2,219
  4. Step 4: Simplify right side
    3,756.92x = 12,514,849.34
  5. Step 5: Solve for x
    x = 12,514,849.34/3,756.92
  6. Step 6: Final answer
    x = 3,331.15

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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.