Home / 1,919.19-2,878.31-823.43

Finding the Fourth Proportional to 1,919.19, 2,878.31 and 823.43

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Solution

The fourth proportional to 1,919.19, 2,878.31 and 823.43 is: 1,234.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.19 : 2,878.31 = 823.43 : x
  2. Step 2: Convert to fraction form
    1,919.19/2,878.31 = 823.43/x
  3. Step 3: Cross multiply
    1,919.19x = 2,878.31 × 823.43
  4. Step 4: Simplify right side
    1,919.19x = 2,370,068.29
  5. Step 5: Solve for x
    x = 2,370,068.29/1,919.19
  6. Step 6: Final answer
    x = 1,234.93

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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.