Home / 4,919.78-7,379.40-1,998.38

Finding the Fourth Proportional to 4,919.78, 7,379.40 and 1,998.38

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Solution

The fourth proportional to 4,919.78, 7,379.40 and 1,998.38 is: 2,997.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,919.78 : 7,379.40 = 1,998.38 : x
  2. Step 2: Convert to fraction form
    4,919.78/7,379.40 = 1,998.38/x
  3. Step 3: Cross multiply
    4,919.78x = 7,379.40 × 1,998.38
  4. Step 4: Simplify right side
    4,919.78x = 14,746,845.37
  5. Step 5: Solve for x
    x = 14,746,845.37/4,919.78
  6. Step 6: Final answer
    x = 2,997.46

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1.5x scale

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.