Home / 1,890.57-2,609.21-1,144.78

Finding the Fourth Proportional to 1,890.57, 2,609.21 and 1,144.78

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Solution

The fourth proportional to 1,890.57, 2,609.21 and 1,144.78 is: 1,579.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.57 : 2,609.21 = 1,144.78 : x
  2. Step 2: Convert to fraction form
    1,890.57/2,609.21 = 1,144.78/x
  3. Step 3: Cross multiply
    1,890.57x = 2,609.21 × 1,144.78
  4. Step 4: Simplify right side
    1,890.57x = 2,986,982.44
  5. Step 5: Solve for x
    x = 2,986,982.44/1,890.57
  6. Step 6: Final answer
    x = 1,579.94

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1.5x scale

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.