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Finding the Fourth Proportional to 644,453.88, 889,346.82 and 354,084.16

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Solution

The fourth proportional to 644,453.88, 889,346.82 and 354,084.16 is: 488,636.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,453.88 : 889,346.82 = 354,084.16 : x
  2. Step 2: Convert to fraction form
    644,453.88/889,346.82 = 354,084.16/x
  3. Step 3: Cross multiply
    644,453.88x = 889,346.82 × 354,084.16
  4. Step 4: Simplify right side
    644,453.88x = 314,903,621,708.37
  5. Step 5: Solve for x
    x = 314,903,621,708.37/644,453.88
  6. Step 6: Final answer
    x = 488,636.40

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Double scale
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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.