Home / 1,285.50-1,928.25-1,131.42

Finding the Fourth Proportional to 1,285.50, 1,928.25 and 1,131.42

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Solution

The fourth proportional to 1,285.50, 1,928.25 and 1,131.42 is: 1,697.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.50 : 1,928.25 = 1,131.42 : x
  2. Step 2: Convert to fraction form
    1,285.50/1,928.25 = 1,131.42/x
  3. Step 3: Cross multiply
    1,285.50x = 1,928.25 × 1,131.42
  4. Step 4: Simplify right side
    1,285.50x = 2,181,660.62
  5. Step 5: Solve for x
    x = 2,181,660.62/1,285.50
  6. Step 6: Final answer
    x = 1,697.13

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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.