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Finding the Fourth Proportional to 621,811.20, 932,716.80 and 201,129.60

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Solution

The fourth proportional to 621,811.20, 932,716.80 and 201,129.60 is: 301,694.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,811.20 : 932,716.80 = 201,129.60 : x
  2. Step 2: Convert to fraction form
    621,811.20/932,716.80 = 201,129.60/x
  3. Step 3: Cross multiply
    621,811.20x = 932,716.80 × 201,129.60
  4. Step 4: Simplify right side
    621,811.20x = 187,596,956,897.28
  5. Step 5: Solve for x
    x = 187,596,956,897.28/621,811.20
  6. Step 6: Final answer
    x = 301,694.40

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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.