Home / 1,905.68-2,856.47-1,245.48

Finding the Fourth Proportional to 1,905.68, 2,856.47 and 1,245.48

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Solution

The fourth proportional to 1,905.68, 2,856.47 and 1,245.48 is: 1,866.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.68 : 2,856.47 = 1,245.48 : x
  2. Step 2: Convert to fraction form
    1,905.68/2,856.47 = 1,245.48/x
  3. Step 3: Cross multiply
    1,905.68x = 2,856.47 × 1,245.48
  4. Step 4: Simplify right side
    1,905.68x = 3,557,659.32
  5. Step 5: Solve for x
    x = 3,557,659.32/1,905.68
  6. Step 6: Final answer
    x = 1,866.87

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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.