Home / 2,141.36-2,954.40-1,209.68

Finding the Fourth Proportional to 2,141.36, 2,954.40 and 1,209.68

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Solution

The fourth proportional to 2,141.36, 2,954.40 and 1,209.68 is: 1,668.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,141.36 : 2,954.40 = 1,209.68 : x
  2. Step 2: Convert to fraction form
    2,141.36/2,954.40 = 1,209.68/x
  3. Step 3: Cross multiply
    2,141.36x = 2,954.40 × 1,209.68
  4. Step 4: Simplify right side
    2,141.36x = 3,573,878.59
  5. Step 5: Solve for x
    x = 3,573,878.59/2,141.36
  6. Step 6: Final answer
    x = 1,668.98

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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.