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Finding the Fourth Proportional to 1,986.85, 2,748.87 and 1,951.93

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Solution

The fourth proportional to 1,986.85, 2,748.87 and 1,951.93 is: 2,700.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.85 : 2,748.87 = 1,951.93 : x
  2. Step 2: Convert to fraction form
    1,986.85/2,748.87 = 1,951.93/x
  3. Step 3: Cross multiply
    1,986.85x = 2,748.87 × 1,951.93
  4. Step 4: Simplify right side
    1,986.85x = 5,365,601.82
  5. Step 5: Solve for x
    x = 5,365,601.82/1,986.85
  6. Step 6: Final answer
    x = 2,700.56

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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.