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Finding the Fourth Proportional to 3,808.95, 5,713.45 and 1,861.31

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Solution

The fourth proportional to 3,808.95, 5,713.45 and 1,861.31 is: 2,791.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,808.95 : 5,713.45 = 1,861.31 : x
  2. Step 2: Convert to fraction form
    3,808.95/5,713.45 = 1,861.31/x
  3. Step 3: Cross multiply
    3,808.95x = 5,713.45 × 1,861.31
  4. Step 4: Simplify right side
    3,808.95x = 10,634,463.75
  5. Step 5: Solve for x
    x = 10,634,463.75/3,808.95
  6. Step 6: Final answer
    x = 2,791.97

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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.