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Finding the Fourth Proportional to 645,620.40, 968,430.60 and 196,337.70

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Solution

The fourth proportional to 645,620.40, 968,430.60 and 196,337.70 is: 294,506.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,620.40 : 968,430.60 = 196,337.70 : x
  2. Step 2: Convert to fraction form
    645,620.40/968,430.60 = 196,337.70/x
  3. Step 3: Cross multiply
    645,620.40x = 968,430.60 × 196,337.70
  4. Step 4: Simplify right side
    645,620.40x = 190,139,436,613.62
  5. Step 5: Solve for x
    x = 190,139,436,613.62/645,620.40
  6. Step 6: Final answer
    x = 294,506.55

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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.