Home / 2,112.66-2,914.08-1,272.79

Finding the Fourth Proportional to 2,112.66, 2,914.08 and 1,272.79

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Solution

The fourth proportional to 2,112.66, 2,914.08 and 1,272.79 is: 1,755.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.66 : 2,914.08 = 1,272.79 : x
  2. Step 2: Convert to fraction form
    2,112.66/2,914.08 = 1,272.79/x
  3. Step 3: Cross multiply
    2,112.66x = 2,914.08 × 1,272.79
  4. Step 4: Simplify right side
    2,112.66x = 3,709,011.88
  5. Step 5: Solve for x
    x = 3,709,011.88/2,112.66
  6. Step 6: Final answer
    x = 1,755.62

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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.