Home / 2,976.76-4,109.70-1,930.78

Finding the Fourth Proportional to 2,976.76, 4,109.70 and 1,930.78

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Solution

The fourth proportional to 2,976.76, 4,109.70 and 1,930.78 is: 2,665.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,976.76 : 4,109.70 = 1,930.78 : x
  2. Step 2: Convert to fraction form
    2,976.76/4,109.70 = 1,930.78/x
  3. Step 3: Cross multiply
    2,976.76x = 4,109.70 × 1,930.78
  4. Step 4: Simplify right side
    2,976.76x = 7,934,926.57
  5. Step 5: Solve for x
    x = 7,934,926.57/2,976.76
  6. Step 6: Final answer
    x = 2,665.63

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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.