Home / 3,127.14-4,690.98-1,278

Finding the Fourth Proportional to 3,127.14, 4,690.98 and 1,278

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Solution

The fourth proportional to 3,127.14, 4,690.98 and 1,278 is: 1,917.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.14 : 4,690.98 = 1,278 : x
  2. Step 2: Convert to fraction form
    3,127.14/4,690.98 = 1,278/x
  3. Step 3: Cross multiply
    3,127.14x = 4,690.98 × 1,278
  4. Step 4: Simplify right side
    3,127.14x = 5,995,072.44
  5. Step 5: Solve for x
    x = 5,995,072.44/3,127.14
  6. Step 6: Final answer
    x = 1,917.11

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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.