Home / 1,886.85-2,827.49-911.79

Finding the Fourth Proportional to 1,886.85, 2,827.49 and 911.79

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Solution

The fourth proportional to 1,886.85, 2,827.49 and 911.79 is: 1,366.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,886.85 : 2,827.49 = 911.79 : x
  2. Step 2: Convert to fraction form
    1,886.85/2,827.49 = 911.79/x
  3. Step 3: Cross multiply
    1,886.85x = 2,827.49 × 911.79
  4. Step 4: Simplify right side
    1,886.85x = 2,578,072.55
  5. Step 5: Solve for x
    x = 2,578,072.55/1,886.85
  6. Step 6: Final answer
    x = 1,366.34

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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.