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Finding the Fourth Proportional to 664,705.40, 997,058.10 and 383,894.60

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Solution

The fourth proportional to 664,705.40, 997,058.10 and 383,894.60 is: 575,841.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,705.40 : 997,058.10 = 383,894.60 : x
  2. Step 2: Convert to fraction form
    664,705.40/997,058.10 = 383,894.60/x
  3. Step 3: Cross multiply
    664,705.40x = 997,058.10 × 383,894.60
  4. Step 4: Simplify right side
    664,705.40x = 382,765,220,476.26
  5. Step 5: Solve for x
    x = 382,765,220,476.26/664,705.40
  6. Step 6: Final answer
    x = 575,841.90

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