Home / 2,919.78-4,379.13-1,276.02

Finding the Fourth Proportional to 2,919.78, 4,379.13 and 1,276.02

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Solution

The fourth proportional to 2,919.78, 4,379.13 and 1,276.02 is: 1,913.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,919.78 : 4,379.13 = 1,276.02 : x
  2. Step 2: Convert to fraction form
    2,919.78/4,379.13 = 1,276.02/x
  3. Step 3: Cross multiply
    2,919.78x = 4,379.13 × 1,276.02
  4. Step 4: Simplify right side
    2,919.78x = 5,587,857.46
  5. Step 5: Solve for x
    x = 5,587,857.46/2,919.78
  6. Step 6: Final answer
    x = 1,913.79

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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.