Home / 2,221.29-3,064.36-1,289.25

Finding the Fourth Proportional to 2,221.29, 3,064.36 and 1,289.25

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Solution

The fourth proportional to 2,221.29, 3,064.36 and 1,289.25 is: 1,778.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.29 : 3,064.36 = 1,289.25 : x
  2. Step 2: Convert to fraction form
    2,221.29/3,064.36 = 1,289.25/x
  3. Step 3: Cross multiply
    2,221.29x = 3,064.36 × 1,289.25
  4. Step 4: Simplify right side
    2,221.29x = 3,950,726.13
  5. Step 5: Solve for x
    x = 3,950,726.13/2,221.29
  6. Step 6: Final answer
    x = 1,778.57

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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.