Home / 2,205.72-3,308.70-1,108.80

Finding the Fourth Proportional to 2,205.72, 3,308.70 and 1,108.80

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Solution

The fourth proportional to 2,205.72, 3,308.70 and 1,108.80 is: 1,663.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,205.72 : 3,308.70 = 1,108.80 : x
  2. Step 2: Convert to fraction form
    2,205.72/3,308.70 = 1,108.80/x
  3. Step 3: Cross multiply
    2,205.72x = 3,308.70 × 1,108.80
  4. Step 4: Simplify right side
    2,205.72x = 3,668,686.56
  5. Step 5: Solve for x
    x = 3,668,686.56/2,205.72
  6. Step 6: Final answer
    x = 1,663.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.