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Finding the Fourth Proportional to 641,684.27, 885,486.25 and 355,187.27

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Solution

The fourth proportional to 641,684.27, 885,486.25 and 355,187.27 is: 490,137.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,684.27 : 885,486.25 = 355,187.27 : x
  2. Step 2: Convert to fraction form
    641,684.27/885,486.25 = 355,187.27/x
  3. Step 3: Cross multiply
    641,684.27x = 885,486.25 × 355,187.27
  4. Step 4: Simplify right side
    641,684.27x = 314,513,443,760.04
  5. Step 5: Solve for x
    x = 314,513,443,760.04/641,684.27
  6. Step 6: Final answer
    x = 490,137.38

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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.