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Finding the Fourth Proportional to 769,072.80, 1,153,609.20 and 769,072.80

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Solution

The fourth proportional to 769,072.80, 1,153,609.20 and 769,072.80 is: 1,153,609.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,072.80 : 1,153,609.20 = 769,072.80 : x
  2. Step 2: Convert to fraction form
    769,072.80/1,153,609.20 = 769,072.80/x
  3. Step 3: Cross multiply
    769,072.80x = 1,153,609.20 × 769,072.80
  4. Step 4: Simplify right side
    769,072.80x = 887,209,457,549.76
  5. Step 5: Solve for x
    x = 887,209,457,549.76/769,072.80
  6. Step 6: Final answer
    x = 1,153,609.20

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Double scale
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Similar ratio
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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.