Home / 1,940.20-2,904.58-1,280.86

Finding the Fourth Proportional to 1,940.20, 2,904.58 and 1,280.86

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Solution

The fourth proportional to 1,940.20, 2,904.58 and 1,280.86 is: 1,917.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.20 : 2,904.58 = 1,280.86 : x
  2. Step 2: Convert to fraction form
    1,940.20/2,904.58 = 1,280.86/x
  3. Step 3: Cross multiply
    1,940.20x = 2,904.58 × 1,280.86
  4. Step 4: Simplify right side
    1,940.20x = 3,720,360.34
  5. Step 5: Solve for x
    x = 3,720,360.34/1,940.20
  6. Step 6: Final answer
    x = 1,917.51

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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.