Home / 1,919.31-2,878.99-1,265.38

Finding the Fourth Proportional to 1,919.31, 2,878.99 and 1,265.38

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Solution

The fourth proportional to 1,919.31, 2,878.99 and 1,265.38 is: 1,898.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.31 : 2,878.99 = 1,265.38 : x
  2. Step 2: Convert to fraction form
    1,919.31/2,878.99 = 1,265.38/x
  3. Step 3: Cross multiply
    1,919.31x = 2,878.99 × 1,265.38
  4. Step 4: Simplify right side
    1,919.31x = 3,643,006.01
  5. Step 5: Solve for x
    x = 3,643,006.01/1,919.31
  6. Step 6: Final answer
    x = 1,898.08

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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.