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Finding the Fourth Proportional to 1,871.91, 2,583.39 and 1,085.91

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Solution

The fourth proportional to 1,871.91, 2,583.39 and 1,085.91 is: 1,498.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,871.91 : 2,583.39 = 1,085.91 : x
  2. Step 2: Convert to fraction form
    1,871.91/2,583.39 = 1,085.91/x
  3. Step 3: Cross multiply
    1,871.91x = 2,583.39 × 1,085.91
  4. Step 4: Simplify right side
    1,871.91x = 2,805,323.42
  5. Step 5: Solve for x
    x = 2,805,323.42/1,871.91
  6. Step 6: Final answer
    x = 1,498.64

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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.