Home / 1,277.10-1,919.70-1,179.90

Finding the Fourth Proportional to 1,277.10, 1,919.70 and 1,179.90

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Solution

The fourth proportional to 1,277.10, 1,919.70 and 1,179.90 is: 1,773.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.10 : 1,919.70 = 1,179.90 : x
  2. Step 2: Convert to fraction form
    1,277.10/1,919.70 = 1,179.90/x
  3. Step 3: Cross multiply
    1,277.10x = 1,919.70 × 1,179.90
  4. Step 4: Simplify right side
    1,277.10x = 2,265,054.03
  5. Step 5: Solve for x
    x = 2,265,054.03/1,277.10
  6. Step 6: Final answer
    x = 1,773.59

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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.