Home / 1,439.87-1,986.75-850.31

Finding the Fourth Proportional to 1,439.87, 1,986.75 and 850.31

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Solution

The fourth proportional to 1,439.87, 1,986.75 and 850.31 is: 1,173.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.87 : 1,986.75 = 850.31 : x
  2. Step 2: Convert to fraction form
    1,439.87/1,986.75 = 850.31/x
  3. Step 3: Cross multiply
    1,439.87x = 1,986.75 × 850.31
  4. Step 4: Simplify right side
    1,439.87x = 1,689,353.39
  5. Step 5: Solve for x
    x = 1,689,353.39/1,439.87
  6. Step 6: Final answer
    x = 1,173.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.