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Finding the Fourth Proportional to 3,857.55, 5,785.03 and 1,259.88

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Solution

The fourth proportional to 3,857.55, 5,785.03 and 1,259.88 is: 1,889.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.55 : 5,785.03 = 1,259.88 : x
  2. Step 2: Convert to fraction form
    3,857.55/5,785.03 = 1,259.88/x
  3. Step 3: Cross multiply
    3,857.55x = 5,785.03 × 1,259.88
  4. Step 4: Simplify right side
    3,857.55x = 7,288,443.60
  5. Step 5: Solve for x
    x = 7,288,443.60/3,857.55
  6. Step 6: Final answer
    x = 1,889.40

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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.