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Finding the Fourth Proportional to 621,000.45, 931,500.68 and 451,726.65

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Solution

The fourth proportional to 621,000.45, 931,500.68 and 451,726.65 is: 677,589.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,000.45 : 931,500.68 = 451,726.65 : x
  2. Step 2: Convert to fraction form
    621,000.45/931,500.68 = 451,726.65/x
  3. Step 3: Cross multiply
    621,000.45x = 931,500.68 × 451,726.65
  4. Step 4: Simplify right side
    621,000.45x = 420,783,679,390.49
  5. Step 5: Solve for x
    x = 420,783,679,390.49/621,000.45
  6. Step 6: Final answer
    x = 677,589.98

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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.