Home / 3,106.35-4,286.87-1,780.31

Finding the Fourth Proportional to 3,106.35, 4,286.87 and 1,780.31

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Solution

The fourth proportional to 3,106.35, 4,286.87 and 1,780.31 is: 2,456.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.35 : 4,286.87 = 1,780.31 : x
  2. Step 2: Convert to fraction form
    3,106.35/4,286.87 = 1,780.31/x
  3. Step 3: Cross multiply
    3,106.35x = 4,286.87 × 1,780.31
  4. Step 4: Simplify right side
    3,106.35x = 7,631,927.19
  5. Step 5: Solve for x
    x = 7,631,927.19/3,106.35
  6. Step 6: Final answer
    x = 2,456.88

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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.