Home / 2,140.11-2,953.40-1,208.43

Finding the Fourth Proportional to 2,140.11, 2,953.40 and 1,208.43

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Solution

The fourth proportional to 2,140.11, 2,953.40 and 1,208.43 is: 1,667.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.11 : 2,953.40 = 1,208.43 : x
  2. Step 2: Convert to fraction form
    2,140.11/2,953.40 = 1,208.43/x
  3. Step 3: Cross multiply
    2,140.11x = 2,953.40 × 1,208.43
  4. Step 4: Simplify right side
    2,140.11x = 3,568,971.12
  5. Step 5: Solve for x
    x = 3,568,971.12/2,140.11
  6. Step 6: Final answer
    x = 1,667.66

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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.