Home / 2,051.29-2,831.74-1,389.21

Finding the Fourth Proportional to 2,051.29, 2,831.74 and 1,389.21

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Solution

The fourth proportional to 2,051.29, 2,831.74 and 1,389.21 is: 1,917.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,051.29 : 2,831.74 = 1,389.21 : x
  2. Step 2: Convert to fraction form
    2,051.29/2,831.74 = 1,389.21/x
  3. Step 3: Cross multiply
    2,051.29x = 2,831.74 × 1,389.21
  4. Step 4: Simplify right side
    2,051.29x = 3,933,878.05
  5. Step 5: Solve for x
    x = 3,933,878.05/2,051.29
  6. Step 6: Final answer
    x = 1,917.76

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.