Home / 2,228.86-3,077.32-1,389.90

Finding the Fourth Proportional to 2,228.86, 3,077.32 and 1,389.90

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Solution

The fourth proportional to 2,228.86, 3,077.32 and 1,389.90 is: 1,918.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,228.86 : 3,077.32 = 1,389.90 : x
  2. Step 2: Convert to fraction form
    2,228.86/3,077.32 = 1,389.90/x
  3. Step 3: Cross multiply
    2,228.86x = 3,077.32 × 1,389.90
  4. Step 4: Simplify right side
    2,228.86x = 4,277,160.12
  5. Step 5: Solve for x
    x = 4,277,160.12/2,228.86
  6. Step 6: Final answer
    x = 1,918.99

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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.