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Finding the Fourth Proportional to 639,459.60, 959,189.40 and 448,688.40

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Solution

The fourth proportional to 639,459.60, 959,189.40 and 448,688.40 is: 673,032.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,459.60 : 959,189.40 = 448,688.40 : x
  2. Step 2: Convert to fraction form
    639,459.60/959,189.40 = 448,688.40/x
  3. Step 3: Cross multiply
    639,459.60x = 959,189.40 × 448,688.40
  4. Step 4: Simplify right side
    639,459.60x = 430,377,157,182.96
  5. Step 5: Solve for x
    x = 430,377,157,182.96/639,459.60
  6. Step 6: Final answer
    x = 673,032.60

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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.