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Finding the Fourth Proportional to 2,611.96, 3,917.54 and 856.96

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Solution

The fourth proportional to 2,611.96, 3,917.54 and 856.96 is: 1,285.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,611.96 : 3,917.54 = 856.96 : x
  2. Step 2: Convert to fraction form
    2,611.96/3,917.54 = 856.96/x
  3. Step 3: Cross multiply
    2,611.96x = 3,917.54 × 856.96
  4. Step 4: Simplify right side
    2,611.96x = 3,357,175.08
  5. Step 5: Solve for x
    x = 3,357,175.08/2,611.96
  6. Step 6: Final answer
    x = 1,285.31

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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.