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Finding the Fourth Proportional to 645,638.40, 968,457.60 and 196,355.70

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Solution

The fourth proportional to 645,638.40, 968,457.60 and 196,355.70 is: 294,533.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,638.40 : 968,457.60 = 196,355.70 : x
  2. Step 2: Convert to fraction form
    645,638.40/968,457.60 = 196,355.70/x
  3. Step 3: Cross multiply
    645,638.40x = 968,457.60 × 196,355.70
  4. Step 4: Simplify right side
    645,638.40x = 190,162,169,968.32
  5. Step 5: Solve for x
    x = 190,162,169,968.32/645,638.40
  6. Step 6: Final answer
    x = 294,533.55

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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.