Home / 3,459.36-5,190-1,921.44

Finding the Fourth Proportional to 3,459.36, 5,190 and 1,921.44

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Solution

The fourth proportional to 3,459.36, 5,190 and 1,921.44 is: 2,882.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,459.36 : 5,190 = 1,921.44 : x
  2. Step 2: Convert to fraction form
    3,459.36/5,190 = 1,921.44/x
  3. Step 3: Cross multiply
    3,459.36x = 5,190 × 1,921.44
  4. Step 4: Simplify right side
    3,459.36x = 9,972,273.60
  5. Step 5: Solve for x
    x = 9,972,273.60/3,459.36
  6. Step 6: Final answer
    x = 2,882.69

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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.