Home / 654,115.20-981,172.80-430,166.40

Finding the Fourth Proportional to 654,115.20, 981,172.80 and 430,166.40

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Solution

The fourth proportional to 654,115.20, 981,172.80 and 430,166.40 is: 645,249.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,115.20 : 981,172.80 = 430,166.40 : x
  2. Step 2: Convert to fraction form
    654,115.20/981,172.80 = 430,166.40/x
  3. Step 3: Cross multiply
    654,115.20x = 981,172.80 × 430,166.40
  4. Step 4: Simplify right side
    654,115.20x = 422,067,571,153.92
  5. Step 5: Solve for x
    x = 422,067,571,153.92/654,115.20
  6. Step 6: Final answer
    x = 645,249.60

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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.