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Finding the Fourth Proportional to 1,986.89, 2,741.95 and 1,102.74

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Solution

The fourth proportional to 1,986.89, 2,741.95 and 1,102.74 is: 1,521.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.89 : 2,741.95 = 1,102.74 : x
  2. Step 2: Convert to fraction form
    1,986.89/2,741.95 = 1,102.74/x
  3. Step 3: Cross multiply
    1,986.89x = 2,741.95 × 1,102.74
  4. Step 4: Simplify right side
    1,986.89x = 3,023,644.90
  5. Step 5: Solve for x
    x = 3,023,644.90/1,986.89
  6. Step 6: Final answer
    x = 1,521.80

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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.