Home / 3,427.31-5,140.97-830.25

Finding the Fourth Proportional to 3,427.31, 5,140.97 and 830.25

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Solution

The fourth proportional to 3,427.31, 5,140.97 and 830.25 is: 1,245.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,427.31 : 5,140.97 = 830.25 : x
  2. Step 2: Convert to fraction form
    3,427.31/5,140.97 = 830.25/x
  3. Step 3: Cross multiply
    3,427.31x = 5,140.97 × 830.25
  4. Step 4: Simplify right side
    3,427.31x = 4,268,289.30
  5. Step 5: Solve for x
    x = 4,268,289.30/3,427.31
  6. Step 6: Final answer
    x = 1,245.38

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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.