Home / 2,790.42-4,179.63-2,124.90

Finding the Fourth Proportional to 2,790.42, 4,179.63 and 2,124.90

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Solution

The fourth proportional to 2,790.42, 4,179.63 and 2,124.90 is: 3,182.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.42 : 4,179.63 = 2,124.90 : x
  2. Step 2: Convert to fraction form
    2,790.42/4,179.63 = 2,124.90/x
  3. Step 3: Cross multiply
    2,790.42x = 4,179.63 × 2,124.90
  4. Step 4: Simplify right side
    2,790.42x = 8,881,295.79
  5. Step 5: Solve for x
    x = 8,881,295.79/2,790.42
  6. Step 6: Final answer
    x = 3,182.78

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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.