Home / 2,717.79-4,078.96-1,939.68

Finding the Fourth Proportional to 2,717.79, 4,078.96 and 1,939.68

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Solution

The fourth proportional to 2,717.79, 4,078.96 and 1,939.68 is: 2,911.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,717.79 : 4,078.96 = 1,939.68 : x
  2. Step 2: Convert to fraction form
    2,717.79/4,078.96 = 1,939.68/x
  3. Step 3: Cross multiply
    2,717.79x = 4,078.96 × 1,939.68
  4. Step 4: Simplify right side
    2,717.79x = 7,911,872.28
  5. Step 5: Solve for x
    x = 7,911,872.28/2,717.79
  6. Step 6: Final answer
    x = 2,911.15

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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.