Home / 2,015.20-2,781-1,118.96

Finding the Fourth Proportional to 2,015.20, 2,781 and 1,118.96

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Solution

The fourth proportional to 2,015.20, 2,781 and 1,118.96 is: 1,544.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,015.20 : 2,781 = 1,118.96 : x
  2. Step 2: Convert to fraction form
    2,015.20/2,781 = 1,118.96/x
  3. Step 3: Cross multiply
    2,015.20x = 2,781 × 1,118.96
  4. Step 4: Simplify right side
    2,015.20x = 3,111,827.76
  5. Step 5: Solve for x
    x = 3,111,827.76/2,015.20
  6. Step 6: Final answer
    x = 1,544.18

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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.