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Finding the Fourth Proportional to 43,776.80, 65,665.20 and 19,200.80

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Solution

The fourth proportional to 43,776.80, 65,665.20 and 19,200.80 is: 28,801.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,776.80 : 65,665.20 = 19,200.80 : x
  2. Step 2: Convert to fraction form
    43,776.80/65,665.20 = 19,200.80/x
  3. Step 3: Cross multiply
    43,776.80x = 65,665.20 × 19,200.80
  4. Step 4: Simplify right side
    43,776.80x = 1,260,824,372.16
  5. Step 5: Solve for x
    x = 1,260,824,372.16/43,776.80
  6. Step 6: Final answer
    x = 28,801.20

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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.