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Finding the Fourth Proportional to 1,205.84, 1,662.60 and 1,019

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Solution

The fourth proportional to 1,205.84, 1,662.60 and 1,019 is: 1,404.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205.84 : 1,662.60 = 1,019 : x
  2. Step 2: Convert to fraction form
    1,205.84/1,662.60 = 1,019/x
  3. Step 3: Cross multiply
    1,205.84x = 1,662.60 × 1,019
  4. Step 4: Simplify right side
    1,205.84x = 1,694,189.40
  5. Step 5: Solve for x
    x = 1,694,189.40/1,205.84
  6. Step 6: Final answer
    x = 1,404.99

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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.