Home / 2,015.19-2,780.96-1,131.28

Finding the Fourth Proportional to 2,015.19, 2,780.96 and 1,131.28

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Solution

The fourth proportional to 2,015.19, 2,780.96 and 1,131.28 is: 1,561.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,015.19 : 2,780.96 = 1,131.28 : x
  2. Step 2: Convert to fraction form
    2,015.19/2,780.96 = 1,131.28/x
  3. Step 3: Cross multiply
    2,015.19x = 2,780.96 × 1,131.28
  4. Step 4: Simplify right side
    2,015.19x = 3,146,046.07
  5. Step 5: Solve for x
    x = 3,146,046.07/2,015.19
  6. Step 6: Final answer
    x = 1,561.16

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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.