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Finding the Fourth Proportional to 3,855.48, 5,783.74 and 1,257.56

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Solution

The fourth proportional to 3,855.48, 5,783.74 and 1,257.56 is: 1,886.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.48 : 5,783.74 = 1,257.56 : x
  2. Step 2: Convert to fraction form
    3,855.48/5,783.74 = 1,257.56/x
  3. Step 3: Cross multiply
    3,855.48x = 5,783.74 × 1,257.56
  4. Step 4: Simplify right side
    3,855.48x = 7,273,400.07
  5. Step 5: Solve for x
    x = 7,273,400.07/3,855.48
  6. Step 6: Final answer
    x = 1,886.51

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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.