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Finding the Fourth Proportional to 2,069.19, 3,102.60 and 682.15

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Solution

The fourth proportional to 2,069.19, 3,102.60 and 682.15 is: 1,022.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,069.19 : 3,102.60 = 682.15 : x
  2. Step 2: Convert to fraction form
    2,069.19/3,102.60 = 682.15/x
  3. Step 3: Cross multiply
    2,069.19x = 3,102.60 × 682.15
  4. Step 4: Simplify right side
    2,069.19x = 2,116,423.08
  5. Step 5: Solve for x
    x = 2,116,423.08/2,069.19
  6. Step 6: Final answer
    x = 1,022.83

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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.