Home / 2,220.56-3,064.44-1,289.12

Finding the Fourth Proportional to 2,220.56, 3,064.44 and 1,289.12

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Solution

The fourth proportional to 2,220.56, 3,064.44 and 1,289.12 is: 1,779.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.56 : 3,064.44 = 1,289.12 : x
  2. Step 2: Convert to fraction form
    2,220.56/3,064.44 = 1,289.12/x
  3. Step 3: Cross multiply
    2,220.56x = 3,064.44 × 1,289.12
  4. Step 4: Simplify right side
    2,220.56x = 3,950,430.89
  5. Step 5: Solve for x
    x = 3,950,430.89/2,220.56
  6. Step 6: Final answer
    x = 1,779.02

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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.