Home / 1,911.77-2,638.06-1,072.28

Finding the Fourth Proportional to 1,911.77, 2,638.06 and 1,072.28

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Solution

The fourth proportional to 1,911.77, 2,638.06 and 1,072.28 is: 1,479.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.77 : 2,638.06 = 1,072.28 : x
  2. Step 2: Convert to fraction form
    1,911.77/2,638.06 = 1,072.28/x
  3. Step 3: Cross multiply
    1,911.77x = 2,638.06 × 1,072.28
  4. Step 4: Simplify right side
    1,911.77x = 2,828,738.98
  5. Step 5: Solve for x
    x = 2,828,738.98/1,911.77
  6. Step 6: Final answer
    x = 1,479.64

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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.