Home / 2,220.57-3,064.68-1,289.07

Finding the Fourth Proportional to 2,220.57, 3,064.68 and 1,289.07

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Solution

The fourth proportional to 2,220.57, 3,064.68 and 1,289.07 is: 1,779.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.57 : 3,064.68 = 1,289.07 : x
  2. Step 2: Convert to fraction form
    2,220.57/3,064.68 = 1,289.07/x
  3. Step 3: Cross multiply
    2,220.57x = 3,064.68 × 1,289.07
  4. Step 4: Simplify right side
    2,220.57x = 3,950,571.72
  5. Step 5: Solve for x
    x = 3,950,571.72/2,220.57
  6. Step 6: Final answer
    x = 1,779.08

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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.