Home / 1,977.40-2,727.78-1,231.24

Finding the Fourth Proportional to 1,977.40, 2,727.78 and 1,231.24

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Solution

The fourth proportional to 1,977.40, 2,727.78 and 1,231.24 is: 1,698.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.40 : 2,727.78 = 1,231.24 : x
  2. Step 2: Convert to fraction form
    1,977.40/2,727.78 = 1,231.24/x
  3. Step 3: Cross multiply
    1,977.40x = 2,727.78 × 1,231.24
  4. Step 4: Simplify right side
    1,977.40x = 3,358,551.85
  5. Step 5: Solve for x
    x = 3,358,551.85/1,977.40
  6. Step 6: Final answer
    x = 1,698.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.