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Finding the Fourth Proportional to 640,653.60, 884,120.40 and 354,192.12

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Solution

The fourth proportional to 640,653.60, 884,120.40 and 354,192.12 is: 488,795.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,653.60 : 884,120.40 = 354,192.12 : x
  2. Step 2: Convert to fraction form
    640,653.60/884,120.40 = 354,192.12/x
  3. Step 3: Cross multiply
    640,653.60x = 884,120.40 × 354,192.12
  4. Step 4: Simplify right side
    640,653.60x = 313,148,478,811.25
  5. Step 5: Solve for x
    x = 313,148,478,811.25/640,653.60
  6. Step 6: Final answer
    x = 488,795.32

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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.