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Finding the Fourth Proportional to 1,974.50, 2,962.56 and 1,205

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Solution

The fourth proportional to 1,974.50, 2,962.56 and 1,205 is: 1,807.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,974.50 : 2,962.56 = 1,205 : x
  2. Step 2: Convert to fraction form
    1,974.50/2,962.56 = 1,205/x
  3. Step 3: Cross multiply
    1,974.50x = 2,962.56 × 1,205
  4. Step 4: Simplify right side
    1,974.50x = 3,569,884.80
  5. Step 5: Solve for x
    x = 3,569,884.80/1,974.50
  6. Step 6: Final answer
    x = 1,807.99

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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.