Home / 2,148.75-2,965.83-1,217.79

Finding the Fourth Proportional to 2,148.75, 2,965.83 and 1,217.79

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Solution

The fourth proportional to 2,148.75, 2,965.83 and 1,217.79 is: 1,680.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.75 : 2,965.83 = 1,217.79 : x
  2. Step 2: Convert to fraction form
    2,148.75/2,965.83 = 1,217.79/x
  3. Step 3: Cross multiply
    2,148.75x = 2,965.83 × 1,217.79
  4. Step 4: Simplify right side
    2,148.75x = 3,611,758.12
  5. Step 5: Solve for x
    x = 3,611,758.12/2,148.75
  6. Step 6: Final answer
    x = 1,680.86

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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.