Home / 1,798.20-2,699.11-1,278.78

Finding the Fourth Proportional to 1,798.20, 2,699.11 and 1,278.78

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Solution

The fourth proportional to 1,798.20, 2,699.11 and 1,278.78 is: 1,919.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,798.20 : 2,699.11 = 1,278.78 : x
  2. Step 2: Convert to fraction form
    1,798.20/2,699.11 = 1,278.78/x
  3. Step 3: Cross multiply
    1,798.20x = 2,699.11 × 1,278.78
  4. Step 4: Simplify right side
    1,798.20x = 3,451,567.89
  5. Step 5: Solve for x
    x = 3,451,567.89/1,798.20
  6. Step 6: Final answer
    x = 1,919.46

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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.