Home / 2,139.40-3,209.06-968.57

Finding the Fourth Proportional to 2,139.40, 3,209.06 and 968.57

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Solution

The fourth proportional to 2,139.40, 3,209.06 and 968.57 is: 1,452.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.40 : 3,209.06 = 968.57 : x
  2. Step 2: Convert to fraction form
    2,139.40/3,209.06 = 968.57/x
  3. Step 3: Cross multiply
    2,139.40x = 3,209.06 × 968.57
  4. Step 4: Simplify right side
    2,139.40x = 3,108,199.24
  5. Step 5: Solve for x
    x = 3,108,199.24/2,139.40
  6. Step 6: Final answer
    x = 1,452.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.