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Finding the Fourth Proportional to 665,443.80, 998,165.70 and 328,536.45

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Solution

The fourth proportional to 665,443.80, 998,165.70 and 328,536.45 is: 492,804.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,443.80 : 998,165.70 = 328,536.45 : x
  2. Step 2: Convert to fraction form
    665,443.80/998,165.70 = 328,536.45/x
  3. Step 3: Cross multiply
    665,443.80x = 998,165.70 × 328,536.45
  4. Step 4: Simplify right side
    665,443.80x = 327,933,815,589.77
  5. Step 5: Solve for x
    x = 327,933,815,589.77/665,443.80
  6. Step 6: Final answer
    x = 492,804.68

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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.