Home / 2,140.90-2,954.02-1,209.22

Finding the Fourth Proportional to 2,140.90, 2,954.02 and 1,209.22

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Solution

The fourth proportional to 2,140.90, 2,954.02 and 1,209.22 is: 1,668.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.90 : 2,954.02 = 1,209.22 : x
  2. Step 2: Convert to fraction form
    2,140.90/2,954.02 = 1,209.22/x
  3. Step 3: Cross multiply
    2,140.90x = 2,954.02 × 1,209.22
  4. Step 4: Simplify right side
    2,140.90x = 3,572,039.25
  5. Step 5: Solve for x
    x = 3,572,039.25/2,140.90
  6. Step 6: Final answer
    x = 1,668.48

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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.