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Finding the Fourth Proportional to 639,611, 882,657.44 and 353,124.92

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Solution

The fourth proportional to 639,611, 882,657.44 and 353,124.92 is: 487,309.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,611 : 882,657.44 = 353,124.92 : x
  2. Step 2: Convert to fraction form
    639,611/882,657.44 = 353,124.92/x
  3. Step 3: Cross multiply
    639,611x = 882,657.44 × 353,124.92
  4. Step 4: Simplify right side
    639,611x = 311,688,337,887.41
  5. Step 5: Solve for x
    x = 311,688,337,887.41/639,611
  6. Step 6: Final answer
    x = 487,309.22

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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.