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Finding the Fourth Proportional to 639,906.62, 882,995.60 and 353,409.62

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Solution

The fourth proportional to 639,906.62, 882,995.60 and 353,409.62 is: 487,663.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,906.62 : 882,995.60 = 353,409.62 : x
  2. Step 2: Convert to fraction form
    639,906.62/882,995.60 = 353,409.62/x
  3. Step 3: Cross multiply
    639,906.62x = 882,995.60 × 353,409.62
  4. Step 4: Simplify right side
    639,906.62x = 312,059,142,548.69
  5. Step 5: Solve for x
    x = 312,059,142,548.69/639,906.62
  6. Step 6: Final answer
    x = 487,663.56

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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.