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Finding the Fourth Proportional to 639,682.64, 882,755.88 and 353,196.62

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Solution

The fourth proportional to 639,682.64, 882,755.88 and 353,196.62 is: 487,407.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,682.64 : 882,755.88 = 353,196.62 : x
  2. Step 2: Convert to fraction form
    639,682.64/882,755.88 = 353,196.62/x
  3. Step 3: Cross multiply
    639,682.64x = 882,755.88 × 353,196.62
  4. Step 4: Simplify right side
    639,682.64x = 311,786,393,101.13
  5. Step 5: Solve for x
    x = 311,786,393,101.13/639,682.64
  6. Step 6: Final answer
    x = 487,407.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.