Home / 2,221.06-3,065.25-1,289.50

Finding the Fourth Proportional to 2,221.06, 3,065.25 and 1,289.50

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Solution

The fourth proportional to 2,221.06, 3,065.25 and 1,289.50 is: 1,779.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.06 : 3,065.25 = 1,289.50 : x
  2. Step 2: Convert to fraction form
    2,221.06/3,065.25 = 1,289.50/x
  3. Step 3: Cross multiply
    2,221.06x = 3,065.25 × 1,289.50
  4. Step 4: Simplify right side
    2,221.06x = 3,952,639.88
  5. Step 5: Solve for x
    x = 3,952,639.88/2,221.06
  6. Step 6: Final answer
    x = 1,779.62

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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.