Home / 1,881.76-2,821.92-1,111.36

Finding the Fourth Proportional to 1,881.76, 2,821.92 and 1,111.36

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Solution

The fourth proportional to 1,881.76, 2,821.92 and 1,111.36 is: 1,666.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,881.76 : 2,821.92 = 1,111.36 : x
  2. Step 2: Convert to fraction form
    1,881.76/2,821.92 = 1,111.36/x
  3. Step 3: Cross multiply
    1,881.76x = 2,821.92 × 1,111.36
  4. Step 4: Simplify right side
    1,881.76x = 3,136,169.01
  5. Step 5: Solve for x
    x = 3,136,169.01/1,881.76
  6. Step 6: Final answer
    x = 1,666.61

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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.