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Finding the Fourth Proportional to 414,128.70, 621,193.05 and 407,130.30

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Solution

The fourth proportional to 414,128.70, 621,193.05 and 407,130.30 is: 610,695.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,128.70 : 621,193.05 = 407,130.30 : x
  2. Step 2: Convert to fraction form
    414,128.70/621,193.05 = 407,130.30/x
  3. Step 3: Cross multiply
    414,128.70x = 621,193.05 × 407,130.30
  4. Step 4: Simplify right side
    414,128.70x = 252,906,512,804.42
  5. Step 5: Solve for x
    x = 252,906,512,804.42/414,128.70
  6. Step 6: Final answer
    x = 610,695.45

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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.