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Finding the Fourth Proportional to 664,063.60, 995,965.80 and 214,675.60

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Solution

The fourth proportional to 664,063.60, 995,965.80 and 214,675.60 is: 321,971.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,063.60 : 995,965.80 = 214,675.60 : x
  2. Step 2: Convert to fraction form
    664,063.60/995,965.80 = 214,675.60/x
  3. Step 3: Cross multiply
    664,063.60x = 995,965.80 × 214,675.60
  4. Step 4: Simplify right side
    664,063.60x = 213,809,555,694.48
  5. Step 5: Solve for x
    x = 213,809,555,694.48/664,063.60
  6. Step 6: Final answer
    x = 321,971.50

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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.