Home / 1,856.20-2,789.70-1,618.60

Finding the Fourth Proportional to 1,856.20, 2,789.70 and 1,618.60

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Solution

The fourth proportional to 1,856.20, 2,789.70 and 1,618.60 is: 2,432.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,856.20 : 2,789.70 = 1,618.60 : x
  2. Step 2: Convert to fraction form
    1,856.20/2,789.70 = 1,618.60/x
  3. Step 3: Cross multiply
    1,856.20x = 2,789.70 × 1,618.60
  4. Step 4: Simplify right side
    1,856.20x = 4,515,408.42
  5. Step 5: Solve for x
    x = 4,515,408.42/1,856.20
  6. Step 6: Final answer
    x = 2,432.61

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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.