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Finding the Fourth Proportional to 643,569.80, 965,354.70 and 222,705.80

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Solution

The fourth proportional to 643,569.80, 965,354.70 and 222,705.80 is: 334,058.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,569.80 : 965,354.70 = 222,705.80 : x
  2. Step 2: Convert to fraction form
    643,569.80/965,354.70 = 222,705.80/x
  3. Step 3: Cross multiply
    643,569.80x = 965,354.70 × 222,705.80
  4. Step 4: Simplify right side
    643,569.80x = 214,990,090,747.26
  5. Step 5: Solve for x
    x = 214,990,090,747.26/643,569.80
  6. Step 6: Final answer
    x = 334,058.70

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.