Home / 2,919.36-4,029.40-1,924.78

Finding the Fourth Proportional to 2,919.36, 4,029.40 and 1,924.78

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Solution

The fourth proportional to 2,919.36, 4,029.40 and 1,924.78 is: 2,656.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,919.36 : 4,029.40 = 1,924.78 : x
  2. Step 2: Convert to fraction form
    2,919.36/4,029.40 = 1,924.78/x
  3. Step 3: Cross multiply
    2,919.36x = 4,029.40 × 1,924.78
  4. Step 4: Simplify right side
    2,919.36x = 7,755,708.53
  5. Step 5: Solve for x
    x = 7,755,708.53/2,919.36
  6. Step 6: Final answer
    x = 2,656.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.