Home / 1,786.20-2,668.41-1,421.40

Finding the Fourth Proportional to 1,786.20, 2,668.41 and 1,421.40

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Solution

The fourth proportional to 1,786.20, 2,668.41 and 1,421.40 is: 2,123.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.20 : 2,668.41 = 1,421.40 : x
  2. Step 2: Convert to fraction form
    1,786.20/2,668.41 = 1,421.40/x
  3. Step 3: Cross multiply
    1,786.20x = 2,668.41 × 1,421.40
  4. Step 4: Simplify right side
    1,786.20x = 3,792,866.97
  5. Step 5: Solve for x
    x = 3,792,866.97/1,786.20
  6. Step 6: Final answer
    x = 2,123.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.