Home / 3,106.15-4,286.73-1,780.18

Finding the Fourth Proportional to 3,106.15, 4,286.73 and 1,780.18

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Solution

The fourth proportional to 3,106.15, 4,286.73 and 1,780.18 is: 2,456.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.15 : 4,286.73 = 1,780.18 : x
  2. Step 2: Convert to fraction form
    3,106.15/4,286.73 = 1,780.18/x
  3. Step 3: Cross multiply
    3,106.15x = 4,286.73 × 1,780.18
  4. Step 4: Simplify right side
    3,106.15x = 7,631,151.01
  5. Step 5: Solve for x
    x = 7,631,151.01/3,106.15
  6. Step 6: Final answer
    x = 2,456.79

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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.