Home / 2,105.08-2,904.68-1,220.70

Finding the Fourth Proportional to 2,105.08, 2,904.68 and 1,220.70

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Solution

The fourth proportional to 2,105.08, 2,904.68 and 1,220.70 is: 1,684.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,105.08 : 2,904.68 = 1,220.70 : x
  2. Step 2: Convert to fraction form
    2,105.08/2,904.68 = 1,220.70/x
  3. Step 3: Cross multiply
    2,105.08x = 2,904.68 × 1,220.70
  4. Step 4: Simplify right side
    2,105.08x = 3,545,742.88
  5. Step 5: Solve for x
    x = 3,545,742.88/2,105.08
  6. Step 6: Final answer
    x = 1,684.37

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Double scale
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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.