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Finding the Fourth Proportional to 886,870.40, 1,330,305.60 and 512,700.80

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Solution

The fourth proportional to 886,870.40, 1,330,305.60 and 512,700.80 is: 769,051.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,870.40 : 1,330,305.60 = 512,700.80 : x
  2. Step 2: Convert to fraction form
    886,870.40/1,330,305.60 = 512,700.80/x
  3. Step 3: Cross multiply
    886,870.40x = 1,330,305.60 × 512,700.80
  4. Step 4: Simplify right side
    886,870.40x = 682,048,745,364.48
  5. Step 5: Solve for x
    x = 682,048,745,364.48/886,870.40
  6. Step 6: Final answer
    x = 769,051.20

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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.