Home / 3,861.20-5,791.64-1,780.51

Finding the Fourth Proportional to 3,861.20, 5,791.64 and 1,780.51

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Solution

The fourth proportional to 3,861.20, 5,791.64 and 1,780.51 is: 2,670.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,861.20 : 5,791.64 = 1,780.51 : x
  2. Step 2: Convert to fraction form
    3,861.20/5,791.64 = 1,780.51/x
  3. Step 3: Cross multiply
    3,861.20x = 5,791.64 × 1,780.51
  4. Step 4: Simplify right side
    3,861.20x = 10,312,072.94
  5. Step 5: Solve for x
    x = 10,312,072.94/3,861.20
  6. Step 6: Final answer
    x = 2,670.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.