Home / 1,868.70-2,578.28-1,205.30

Finding the Fourth Proportional to 1,868.70, 2,578.28 and 1,205.30

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Solution

The fourth proportional to 1,868.70, 2,578.28 and 1,205.30 is: 1,662.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.70 : 2,578.28 = 1,205.30 : x
  2. Step 2: Convert to fraction form
    1,868.70/2,578.28 = 1,205.30/x
  3. Step 3: Cross multiply
    1,868.70x = 2,578.28 × 1,205.30
  4. Step 4: Simplify right side
    1,868.70x = 3,107,600.88
  5. Step 5: Solve for x
    x = 3,107,600.88/1,868.70
  6. Step 6: Final answer
    x = 1,662.97

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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.