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Finding the Fourth Proportional to 640,845, 961,037.66 and 191,482.11

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Solution

The fourth proportional to 640,845, 961,037.66 and 191,482.11 is: 287,154.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,845 : 961,037.66 = 191,482.11 : x
  2. Step 2: Convert to fraction form
    640,845/961,037.66 = 191,482.11/x
  3. Step 3: Cross multiply
    640,845x = 961,037.66 × 191,482.11
  4. Step 4: Simplify right side
    640,845x = 184,021,519,404.97
  5. Step 5: Solve for x
    x = 184,021,519,404.97/640,845
  6. Step 6: Final answer
    x = 287,154.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.