Home / 1,285.96-1,926.62-1,081.80

Finding the Fourth Proportional to 1,285.96, 1,926.62 and 1,081.80

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Solution

The fourth proportional to 1,285.96, 1,926.62 and 1,081.80 is: 1,620.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.96 : 1,926.62 = 1,081.80 : x
  2. Step 2: Convert to fraction form
    1,285.96/1,926.62 = 1,081.80/x
  3. Step 3: Cross multiply
    1,285.96x = 1,926.62 × 1,081.80
  4. Step 4: Simplify right side
    1,285.96x = 2,084,217.52
  5. Step 5: Solve for x
    x = 2,084,217.52/1,285.96
  6. Step 6: Final answer
    x = 1,620.75

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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.