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Finding the Fourth Proportional to 3,856.63, 5,784.87 and 1,259.57

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Solution

The fourth proportional to 3,856.63, 5,784.87 and 1,259.57 is: 1,889.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.63 : 5,784.87 = 1,259.57 : x
  2. Step 2: Convert to fraction form
    3,856.63/5,784.87 = 1,259.57/x
  3. Step 3: Cross multiply
    3,856.63x = 5,784.87 × 1,259.57
  4. Step 4: Simplify right side
    3,856.63x = 7,286,428.27
  5. Step 5: Solve for x
    x = 7,286,428.27/3,856.63
  6. Step 6: Final answer
    x = 1,889.33

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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.