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Finding the Fourth Proportional to 639,311.80, 958,622.10 and 265,372.60

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Solution

The fourth proportional to 639,311.80, 958,622.10 and 265,372.60 is: 397,915.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,311.80 : 958,622.10 = 265,372.60 : x
  2. Step 2: Convert to fraction form
    639,311.80/958,622.10 = 265,372.60/x
  3. Step 3: Cross multiply
    639,311.80x = 958,622.10 × 265,372.60
  4. Step 4: Simplify right side
    639,311.80x = 254,392,039,094.46
  5. Step 5: Solve for x
    x = 254,392,039,094.46/639,311.80
  6. Step 6: Final answer
    x = 397,915.44

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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.