Home / 1,919.38-2,879.08-551.38

Finding the Fourth Proportional to 1,919.38, 2,879.08 and 551.38

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Solution

The fourth proportional to 1,919.38, 2,879.08 and 551.38 is: 827.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.38 : 2,879.08 = 551.38 : x
  2. Step 2: Convert to fraction form
    1,919.38/2,879.08 = 551.38/x
  3. Step 3: Cross multiply
    1,919.38x = 2,879.08 × 551.38
  4. Step 4: Simplify right side
    1,919.38x = 1,587,467.13
  5. Step 5: Solve for x
    x = 1,587,467.13/1,919.38
  6. Step 6: Final answer
    x = 827.07

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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.