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Finding the Fourth Proportional to 645,611.40, 968,417.10 and 196,328.70

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Solution

The fourth proportional to 645,611.40, 968,417.10 and 196,328.70 is: 294,493.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,611.40 : 968,417.10 = 196,328.70 : x
  2. Step 2: Convert to fraction form
    645,611.40/968,417.10 = 196,328.70/x
  3. Step 3: Cross multiply
    645,611.40x = 968,417.10 × 196,328.70
  4. Step 4: Simplify right side
    645,611.40x = 190,128,070,300.77
  5. Step 5: Solve for x
    x = 190,128,070,300.77/645,611.40
  6. Step 6: Final answer
    x = 294,493.05

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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.