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Finding the Fourth Proportional to 639,383.64, 959,255.28 and 279,586.08

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Solution

The fourth proportional to 639,383.64, 959,255.28 and 279,586.08 is: 419,457.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,383.64 : 959,255.28 = 279,586.08 : x
  2. Step 2: Convert to fraction form
    639,383.64/959,255.28 = 279,586.08/x
  3. Step 3: Cross multiply
    639,383.64x = 959,255.28 × 279,586.08
  4. Step 4: Simplify right side
    639,383.64x = 268,194,423,454.50
  5. Step 5: Solve for x
    x = 268,194,423,454.50/639,383.64
  6. Step 6: Final answer
    x = 419,457.75

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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.