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Finding the Fourth Proportional to 1,914.13, 2,868.85 and 816.18

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Solution

The fourth proportional to 1,914.13, 2,868.85 and 816.18 is: 1,223.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,914.13 : 2,868.85 = 816.18 : x
  2. Step 2: Convert to fraction form
    1,914.13/2,868.85 = 816.18/x
  3. Step 3: Cross multiply
    1,914.13x = 2,868.85 × 816.18
  4. Step 4: Simplify right side
    1,914.13x = 2,341,497.99
  5. Step 5: Solve for x
    x = 2,341,497.99/1,914.13
  6. Step 6: Final answer
    x = 1,223.27

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1.5x scale

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.