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Finding the Fourth Proportional to 3,855.42, 5,783.76 and 1,391.76

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Solution

The fourth proportional to 3,855.42, 5,783.76 and 1,391.76 is: 2,087.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.42 : 5,783.76 = 1,391.76 : x
  2. Step 2: Convert to fraction form
    3,855.42/5,783.76 = 1,391.76/x
  3. Step 3: Cross multiply
    3,855.42x = 5,783.76 × 1,391.76
  4. Step 4: Simplify right side
    3,855.42x = 8,049,605.82
  5. Step 5: Solve for x
    x = 8,049,605.82/3,855.42
  6. Step 6: Final answer
    x = 2,087.87

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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.