Home / 3,106.48-4,286.94-1,780.12

Finding the Fourth Proportional to 3,106.48, 4,286.94 and 1,780.12

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Solution

The fourth proportional to 3,106.48, 4,286.94 and 1,780.12 is: 2,456.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.48 : 4,286.94 = 1,780.12 : x
  2. Step 2: Convert to fraction form
    3,106.48/4,286.94 = 1,780.12/x
  3. Step 3: Cross multiply
    3,106.48x = 4,286.94 × 1,780.12
  4. Step 4: Simplify right side
    3,106.48x = 7,631,267.63
  5. Step 5: Solve for x
    x = 7,631,267.63/3,106.48
  6. Step 6: Final answer
    x = 2,456.56

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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.