Home / 1,610.99-2,221.40-1,399.28

Finding the Fourth Proportional to 1,610.99, 2,221.40 and 1,399.28

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Solution

The fourth proportional to 1,610.99, 2,221.40 and 1,399.28 is: 1,929.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,610.99 : 2,221.40 = 1,399.28 : x
  2. Step 2: Convert to fraction form
    1,610.99/2,221.40 = 1,399.28/x
  3. Step 3: Cross multiply
    1,610.99x = 2,221.40 × 1,399.28
  4. Step 4: Simplify right side
    1,610.99x = 3,108,359.15
  5. Step 5: Solve for x
    x = 3,108,359.15/1,610.99
  6. Step 6: Final answer
    x = 1,929.48

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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.