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Finding the Fourth Proportional to 2,137.86, 3,206.76 and 676.74

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Solution

The fourth proportional to 2,137.86, 3,206.76 and 676.74 is: 1,015.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,137.86 : 3,206.76 = 676.74 : x
  2. Step 2: Convert to fraction form
    2,137.86/3,206.76 = 676.74/x
  3. Step 3: Cross multiply
    2,137.86x = 3,206.76 × 676.74
  4. Step 4: Simplify right side
    2,137.86x = 2,170,142.76
  5. Step 5: Solve for x
    x = 2,170,142.76/2,137.86
  6. Step 6: Final answer
    x = 1,015.10

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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.