Home / 3,186.91-4,397.90-1,860.81

Finding the Fourth Proportional to 3,186.91, 4,397.90 and 1,860.81

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Solution

The fourth proportional to 3,186.91, 4,397.90 and 1,860.81 is: 2,567.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.91 : 4,397.90 = 1,860.81 : x
  2. Step 2: Convert to fraction form
    3,186.91/4,397.90 = 1,860.81/x
  3. Step 3: Cross multiply
    3,186.91x = 4,397.90 × 1,860.81
  4. Step 4: Simplify right side
    3,186.91x = 8,183,656.30
  5. Step 5: Solve for x
    x = 8,183,656.30/3,186.91
  6. Step 6: Final answer
    x = 2,567.90

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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.