Home / 3,106.67-4,287.20-1,780.38

Finding the Fourth Proportional to 3,106.67, 4,287.20 and 1,780.38

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Solution

The fourth proportional to 3,106.67, 4,287.20 and 1,780.38 is: 2,456.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.67 : 4,287.20 = 1,780.38 : x
  2. Step 2: Convert to fraction form
    3,106.67/4,287.20 = 1,780.38/x
  3. Step 3: Cross multiply
    3,106.67x = 4,287.20 × 1,780.38
  4. Step 4: Simplify right side
    3,106.67x = 7,632,836.23
  5. Step 5: Solve for x
    x = 7,632,836.23/3,106.67
  6. Step 6: Final answer
    x = 2,456.92

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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.