Home / 2,120.81-2,927.70-1,236.47

Finding the Fourth Proportional to 2,120.81, 2,927.70 and 1,236.47

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Solution

The fourth proportional to 2,120.81, 2,927.70 and 1,236.47 is: 1,706.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.81 : 2,927.70 = 1,236.47 : x
  2. Step 2: Convert to fraction form
    2,120.81/2,927.70 = 1,236.47/x
  3. Step 3: Cross multiply
    2,120.81x = 2,927.70 × 1,236.47
  4. Step 4: Simplify right side
    2,120.81x = 3,619,998.58
  5. Step 5: Solve for x
    x = 3,619,998.58/2,120.81
  6. Step 6: Final answer
    x = 1,706.90

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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.