Home / 1,911.96-2,872.73-1,218.94

Finding the Fourth Proportional to 1,911.96, 2,872.73 and 1,218.94

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Solution

The fourth proportional to 1,911.96, 2,872.73 and 1,218.94 is: 1,831.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.96 : 2,872.73 = 1,218.94 : x
  2. Step 2: Convert to fraction form
    1,911.96/2,872.73 = 1,218.94/x
  3. Step 3: Cross multiply
    1,911.96x = 2,872.73 × 1,218.94
  4. Step 4: Simplify right side
    1,911.96x = 3,501,685.51
  5. Step 5: Solve for x
    x = 3,501,685.51/1,911.96
  6. Step 6: Final answer
    x = 1,831.46

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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.