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Finding the Fourth Proportional to 640,445.68, 883,761.87 and 353,965.69

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Solution

The fourth proportional to 640,445.68, 883,761.87 and 353,965.69 is: 488,443.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,445.68 : 883,761.87 = 353,965.69 : x
  2. Step 2: Convert to fraction form
    640,445.68/883,761.87 = 353,965.69/x
  3. Step 3: Cross multiply
    640,445.68x = 883,761.87 × 353,965.69
  4. Step 4: Simplify right side
    640,445.68x = 312,821,380,110.24
  5. Step 5: Solve for x
    x = 312,821,380,110.24/640,445.68
  6. Step 6: Final answer
    x = 488,443.27

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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.