Home / 3,139.89-4,711.20-1,192.65

Finding the Fourth Proportional to 3,139.89, 4,711.20 and 1,192.65

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Solution

The fourth proportional to 3,139.89, 4,711.20 and 1,192.65 is: 1,789.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.89 : 4,711.20 = 1,192.65 : x
  2. Step 2: Convert to fraction form
    3,139.89/4,711.20 = 1,192.65/x
  3. Step 3: Cross multiply
    3,139.89x = 4,711.20 × 1,192.65
  4. Step 4: Simplify right side
    3,139.89x = 5,618,812.68
  5. Step 5: Solve for x
    x = 5,618,812.68/3,139.89
  6. Step 6: Final answer
    x = 1,789.49

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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.