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Finding the Fourth Proportional to 640,648.58, 884,113.48 and 354,187.11

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Solution

The fourth proportional to 640,648.58, 884,113.48 and 354,187.11 is: 488,788.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,648.58 : 884,113.48 = 354,187.11 : x
  2. Step 2: Convert to fraction form
    640,648.58/884,113.48 = 354,187.11/x
  3. Step 3: Cross multiply
    640,648.58x = 884,113.48 × 354,187.11
  4. Step 4: Simplify right side
    640,648.58x = 313,141,597,507.78
  5. Step 5: Solve for x
    x = 313,141,597,507.78/640,648.58
  6. Step 6: Final answer
    x = 488,788.41

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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.