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Finding the Fourth Proportional to 665,190.80, 997,915.80 and 265,763.60

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Solution

The fourth proportional to 665,190.80, 997,915.80 and 265,763.60 is: 398,697.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,190.80 : 997,915.80 = 265,763.60 : x
  2. Step 2: Convert to fraction form
    665,190.80/997,915.80 = 265,763.60/x
  3. Step 3: Cross multiply
    665,190.80x = 997,915.80 × 265,763.60
  4. Step 4: Simplify right side
    665,190.80x = 265,209,695,504.88
  5. Step 5: Solve for x
    x = 265,209,695,504.88/665,190.80
  6. Step 6: Final answer
    x = 398,697.18

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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.