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Finding the Fourth Proportional to 612,870.60, 919,305.90 and 169,638.60

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Solution

The fourth proportional to 612,870.60, 919,305.90 and 169,638.60 is: 254,457.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,870.60 : 919,305.90 = 169,638.60 : x
  2. Step 2: Convert to fraction form
    612,870.60/919,305.90 = 169,638.60/x
  3. Step 3: Cross multiply
    612,870.60x = 919,305.90 × 169,638.60
  4. Step 4: Simplify right side
    612,870.60x = 155,949,765,847.74
  5. Step 5: Solve for x
    x = 155,949,765,847.74/612,870.60
  6. Step 6: Final answer
    x = 254,457.90

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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.