Home / 2,140.81-2,954.18-1,209.25

Finding the Fourth Proportional to 2,140.81, 2,954.18 and 1,209.25

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Solution

The fourth proportional to 2,140.81, 2,954.18 and 1,209.25 is: 1,668.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.81 : 2,954.18 = 1,209.25 : x
  2. Step 2: Convert to fraction form
    2,140.81/2,954.18 = 1,209.25/x
  3. Step 3: Cross multiply
    2,140.81x = 2,954.18 × 1,209.25
  4. Step 4: Simplify right side
    2,140.81x = 3,572,336.12
  5. Step 5: Solve for x
    x = 3,572,336.12/2,140.81
  6. Step 6: Final answer
    x = 1,668.68

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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.