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Finding the Fourth Proportional to 620,400.60, 930,600.90 and 171,190.80

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Solution

The fourth proportional to 620,400.60, 930,600.90 and 171,190.80 is: 256,786.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,400.60 : 930,600.90 = 171,190.80 : x
  2. Step 2: Convert to fraction form
    620,400.60/930,600.90 = 171,190.80/x
  3. Step 3: Cross multiply
    620,400.60x = 930,600.90 × 171,190.80
  4. Step 4: Simplify right side
    620,400.60x = 159,310,312,551.72
  5. Step 5: Solve for x
    x = 159,310,312,551.72/620,400.60
  6. Step 6: Final answer
    x = 256,786.20

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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.