Home / 2,104.38-2,904.39-1,220.45

Finding the Fourth Proportional to 2,104.38, 2,904.39 and 1,220.45

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Solution

The fourth proportional to 2,104.38, 2,904.39 and 1,220.45 is: 1,684.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,104.38 : 2,904.39 = 1,220.45 : x
  2. Step 2: Convert to fraction form
    2,104.38/2,904.39 = 1,220.45/x
  3. Step 3: Cross multiply
    2,104.38x = 2,904.39 × 1,220.45
  4. Step 4: Simplify right side
    2,104.38x = 3,544,648.25
  5. Step 5: Solve for x
    x = 3,544,648.25/2,104.38
  6. Step 6: Final answer
    x = 1,684.41

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Half scale
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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.