Home / 1,878.10-2,813.55-1,107.70

Finding the Fourth Proportional to 1,878.10, 2,813.55 and 1,107.70

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Solution

The fourth proportional to 1,878.10, 2,813.55 and 1,107.70 is: 1,659.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878.10 : 2,813.55 = 1,107.70 : x
  2. Step 2: Convert to fraction form
    1,878.10/2,813.55 = 1,107.70/x
  3. Step 3: Cross multiply
    1,878.10x = 2,813.55 × 1,107.70
  4. Step 4: Simplify right side
    1,878.10x = 3,116,569.34
  5. Step 5: Solve for x
    x = 3,116,569.34/1,878.10
  6. Step 6: Final answer
    x = 1,659.43

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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.