Home / 1,921.10-2,878.85-1,042.85

Finding the Fourth Proportional to 1,921.10, 2,878.85 and 1,042.85

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Solution

The fourth proportional to 1,921.10, 2,878.85 and 1,042.85 is: 1,562.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.10 : 2,878.85 = 1,042.85 : x
  2. Step 2: Convert to fraction form
    1,921.10/2,878.85 = 1,042.85/x
  3. Step 3: Cross multiply
    1,921.10x = 2,878.85 × 1,042.85
  4. Step 4: Simplify right side
    1,921.10x = 3,002,218.53
  5. Step 5: Solve for x
    x = 3,002,218.53/1,921.10
  6. Step 6: Final answer
    x = 1,562.76

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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.