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Finding the Fourth Proportional to 665,090.20, 997,635.30 and 398,713.60

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Solution

The fourth proportional to 665,090.20, 997,635.30 and 398,713.60 is: 598,070.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,090.20 : 997,635.30 = 398,713.60 : x
  2. Step 2: Convert to fraction form
    665,090.20/997,635.30 = 398,713.60/x
  3. Step 3: Cross multiply
    665,090.20x = 997,635.30 × 398,713.60
  4. Step 4: Simplify right side
    665,090.20x = 397,770,761,950.08
  5. Step 5: Solve for x
    x = 397,770,761,950.08/665,090.20
  6. Step 6: Final answer
    x = 598,070.40

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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.