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Finding the Fourth Proportional to 640,649.58, 884,114.86 and 354,188.11

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Solution

The fourth proportional to 640,649.58, 884,114.86 and 354,188.11 is: 488,789.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,649.58 : 884,114.86 = 354,188.11 : x
  2. Step 2: Convert to fraction form
    640,649.58/884,114.86 = 354,188.11/x
  3. Step 3: Cross multiply
    640,649.58x = 884,114.86 × 354,188.11
  4. Step 4: Simplify right side
    640,649.58x = 313,142,971,286.32
  5. Step 5: Solve for x
    x = 313,142,971,286.32/640,649.58
  6. Step 6: Final answer
    x = 488,789.79

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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.