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Finding the Fourth Proportional to 638,674.88, 881,331.09 and 366,551.25

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Solution

The fourth proportional to 638,674.88, 881,331.09 and 366,551.25 is: 505,817.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,674.88 : 881,331.09 = 366,551.25 : x
  2. Step 2: Convert to fraction form
    638,674.88/881,331.09 = 366,551.25/x
  3. Step 3: Cross multiply
    638,674.88x = 881,331.09 × 366,551.25
  4. Step 4: Simplify right side
    638,674.88x = 323,053,012,703.36
  5. Step 5: Solve for x
    x = 323,053,012,703.36/638,674.88
  6. Step 6: Final answer
    x = 505,817.63

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Half scale
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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.