Home / 3,111.57-4,294.16-1,785.71

Finding the Fourth Proportional to 3,111.57, 4,294.16 and 1,785.71

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Solution

The fourth proportional to 3,111.57, 4,294.16 and 1,785.71 is: 2,464.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.57 : 4,294.16 = 1,785.71 : x
  2. Step 2: Convert to fraction form
    3,111.57/4,294.16 = 1,785.71/x
  3. Step 3: Cross multiply
    3,111.57x = 4,294.16 × 1,785.71
  4. Step 4: Simplify right side
    3,111.57x = 7,668,094.05
  5. Step 5: Solve for x
    x = 7,668,094.05/3,111.57
  6. Step 6: Final answer
    x = 2,464.38

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Half scale
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Double scale
Find fourth proportional to 3,112.57, 4,295.54 and 1,786.71
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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.