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Finding the Fourth Proportional to 641,983.36, 885,850.32 and 355,496.32

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Solution

The fourth proportional to 641,983.36, 885,850.32 and 355,496.32 is: 490,536.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,983.36 : 885,850.32 = 355,496.32 : x
  2. Step 2: Convert to fraction form
    641,983.36/885,850.32 = 355,496.32/x
  3. Step 3: Cross multiply
    641,983.36x = 885,850.32 × 355,496.32
  4. Step 4: Simplify right side
    641,983.36x = 314,916,528,830.82
  5. Step 5: Solve for x
    x = 314,916,528,830.82/641,983.36
  6. Step 6: Final answer
    x = 490,536.90

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Double scale
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Similar ratio
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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.