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Finding the Fourth Proportional to 2,676.75, 4,014.63 and 728.70

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Solution

The fourth proportional to 2,676.75, 4,014.63 and 728.70 is: 1,092.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,676.75 : 4,014.63 = 728.70 : x
  2. Step 2: Convert to fraction form
    2,676.75/4,014.63 = 728.70/x
  3. Step 3: Cross multiply
    2,676.75x = 4,014.63 × 728.70
  4. Step 4: Simplify right side
    2,676.75x = 2,925,460.88
  5. Step 5: Solve for x
    x = 2,925,460.88/2,676.75
  6. Step 6: Final answer
    x = 1,092.92

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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.