Home / 3,139.72-4,709.58-1,191.92

Finding the Fourth Proportional to 3,139.72, 4,709.58 and 1,191.92

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Solution

The fourth proportional to 3,139.72, 4,709.58 and 1,191.92 is: 1,787.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.72 : 4,709.58 = 1,191.92 : x
  2. Step 2: Convert to fraction form
    3,139.72/4,709.58 = 1,191.92/x
  3. Step 3: Cross multiply
    3,139.72x = 4,709.58 × 1,191.92
  4. Step 4: Simplify right side
    3,139.72x = 5,613,441.07
  5. Step 5: Solve for x
    x = 5,613,441.07/3,139.72
  6. Step 6: Final answer
    x = 1,787.88

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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.