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Finding the Fourth Proportional to 1,911.01, 2,866.57 and 985.99

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Solution

The fourth proportional to 1,911.01, 2,866.57 and 985.99 is: 1,479.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.01 : 2,866.57 = 985.99 : x
  2. Step 2: Convert to fraction form
    1,911.01/2,866.57 = 985.99/x
  3. Step 3: Cross multiply
    1,911.01x = 2,866.57 × 985.99
  4. Step 4: Simplify right side
    1,911.01x = 2,826,409.35
  5. Step 5: Solve for x
    x = 2,826,409.35/1,911.01
  6. Step 6: Final answer
    x = 1,479.01

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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.