Home / 2,816.19-3,886.44-1,637.20

Finding the Fourth Proportional to 2,816.19, 3,886.44 and 1,637.20

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Solution

The fourth proportional to 2,816.19, 3,886.44 and 1,637.20 is: 2,259.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,816.19 : 3,886.44 = 1,637.20 : x
  2. Step 2: Convert to fraction form
    2,816.19/3,886.44 = 1,637.20/x
  3. Step 3: Cross multiply
    2,816.19x = 3,886.44 × 1,637.20
  4. Step 4: Simplify right side
    2,816.19x = 6,362,879.57
  5. Step 5: Solve for x
    x = 6,362,879.57/2,816.19
  6. Step 6: Final answer
    x = 2,259.39

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Half scale
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Double scale
Find fourth proportional to 2,817.19, 3,887.82 and 1,638.20
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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.