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Finding the Fourth Proportional to 1,657.00, 2,286.65 and 911.00

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Solution

The fourth proportional to 1,657.00, 2,286.65 and 911.00 is: 1,257.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,657.00 : 2,286.65 = 911.00 : x
  2. Step 2: Convert to fraction form
    1,657.00/2,286.65 = 911.00/x
  3. Step 3: Cross multiply
    1,657.00x = 2,286.65 × 911.00
  4. Step 4: Simplify right side
    1,657.00x = 2,083,128.99
  5. Step 5: Solve for x
    x = 2,083,128.99/1,657.00
  6. Step 6: Final answer
    x = 1,257.17

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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.