Home / 1,914.19-2,641.09-1,128.09

Finding the Fourth Proportional to 1,914.19, 2,641.09 and 1,128.09

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Solution

The fourth proportional to 1,914.19, 2,641.09 and 1,128.09 is: 1,556.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,914.19 : 2,641.09 = 1,128.09 : x
  2. Step 2: Convert to fraction form
    1,914.19/2,641.09 = 1,128.09/x
  3. Step 3: Cross multiply
    1,914.19x = 2,641.09 × 1,128.09
  4. Step 4: Simplify right side
    1,914.19x = 2,979,387.22
  5. Step 5: Solve for x
    x = 2,979,387.22/1,914.19
  6. Step 6: Final answer
    x = 1,556.47

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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.