Home / 2,742.32-4,114.96-1,991.90

Finding the Fourth Proportional to 2,742.32, 4,114.96 and 1,991.90

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Solution

The fourth proportional to 2,742.32, 4,114.96 and 1,991.90 is: 2,988.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,742.32 : 4,114.96 = 1,991.90 : x
  2. Step 2: Convert to fraction form
    2,742.32/4,114.96 = 1,991.90/x
  3. Step 3: Cross multiply
    2,742.32x = 4,114.96 × 1,991.90
  4. Step 4: Simplify right side
    2,742.32x = 8,196,588.82
  5. Step 5: Solve for x
    x = 8,196,588.82/2,742.32
  6. Step 6: Final answer
    x = 2,988.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.