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Finding the Fourth Proportional to 647,556.30, 971,334.45 and 643,409.10

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Solution

The fourth proportional to 647,556.30, 971,334.45 and 643,409.10 is: 965,113.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,556.30 : 971,334.45 = 643,409.10 : x
  2. Step 2: Convert to fraction form
    647,556.30/971,334.45 = 643,409.10/x
  3. Step 3: Cross multiply
    647,556.30x = 971,334.45 × 643,409.10
  4. Step 4: Simplify right side
    647,556.30x = 624,965,424,273.50
  5. Step 5: Solve for x
    x = 624,965,424,273.50/647,556.30
  6. Step 6: Final answer
    x = 965,113.65

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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.