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Finding the Fourth Proportional to 641,863.82, 885,799.74 and 355,383.90

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Solution

The fourth proportional to 641,863.82, 885,799.74 and 355,383.90 is: 490,445.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,863.82 : 885,799.74 = 355,383.90 : x
  2. Step 2: Convert to fraction form
    641,863.82/885,799.74 = 355,383.90/x
  3. Step 3: Cross multiply
    641,863.82x = 885,799.74 × 355,383.90
  4. Step 4: Simplify right side
    641,863.82x = 314,798,966,220.19
  5. Step 5: Solve for x
    x = 314,798,966,220.19/641,863.82
  6. Step 6: Final answer
    x = 490,445.11

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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.