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Finding the Fourth Proportional to 2,137.89, 3,206.85 and 677.19

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Solution

The fourth proportional to 2,137.89, 3,206.85 and 677.19 is: 1,015.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,137.89 : 3,206.85 = 677.19 : x
  2. Step 2: Convert to fraction form
    2,137.89/3,206.85 = 677.19/x
  3. Step 3: Cross multiply
    2,137.89x = 3,206.85 × 677.19
  4. Step 4: Simplify right side
    2,137.89x = 2,171,646.75
  5. Step 5: Solve for x
    x = 2,171,646.75/2,137.89
  6. Step 6: Final answer
    x = 1,015.79

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1.5x scale

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.