Home / 3,115.05-4,298.78-1,717.80

Finding the Fourth Proportional to 3,115.05, 4,298.78 and 1,717.80

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Solution

The fourth proportional to 3,115.05, 4,298.78 and 1,717.80 is: 2,370.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.05 : 4,298.78 = 1,717.80 : x
  2. Step 2: Convert to fraction form
    3,115.05/4,298.78 = 1,717.80/x
  3. Step 3: Cross multiply
    3,115.05x = 4,298.78 × 1,717.80
  4. Step 4: Simplify right side
    3,115.05x = 7,384,435.70
  5. Step 5: Solve for x
    x = 7,384,435.70/3,115.05
  6. Step 6: Final answer
    x = 2,370.57

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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.