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Finding the Fourth Proportional to 641,338.63, 885,035.64 and 354,858.71

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Solution

The fourth proportional to 641,338.63, 885,035.64 and 354,858.71 is: 489,698.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,338.63 : 885,035.64 = 354,858.71 : x
  2. Step 2: Convert to fraction form
    641,338.63/885,035.64 = 354,858.71/x
  3. Step 3: Cross multiply
    641,338.63x = 885,035.64 × 354,858.71
  4. Step 4: Simplify right side
    641,338.63x = 314,062,607,727.01
  5. Step 5: Solve for x
    x = 314,062,607,727.01/641,338.63
  6. Step 6: Final answer
    x = 489,698.57

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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.