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Finding the Fourth Proportional to 5,748.80, 8,623.20 and 2,055.20

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Solution

The fourth proportional to 5,748.80, 8,623.20 and 2,055.20 is: 3,082.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,748.80 : 8,623.20 = 2,055.20 : x
  2. Step 2: Convert to fraction form
    5,748.80/8,623.20 = 2,055.20/x
  3. Step 3: Cross multiply
    5,748.80x = 8,623.20 × 2,055.20
  4. Step 4: Simplify right side
    5,748.80x = 17,722,400.64
  5. Step 5: Solve for x
    x = 17,722,400.64/5,748.80
  6. Step 6: Final answer
    x = 3,082.80

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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.