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Finding the Fourth Proportional to 4,920,658.70, 7,380,988.05 and 4,136,837.90

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Solution

The fourth proportional to 4,920,658.70, 7,380,988.05 and 4,136,837.90 is: 6,205,256.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,920,658.70 : 7,380,988.05 = 4,136,837.90 : x
  2. Step 2: Convert to fraction form
    4,920,658.70/7,380,988.05 = 4,136,837.90/x
  3. Step 3: Cross multiply
    4,920,658.70x = 7,380,988.05 × 4,136,837.90
  4. Step 4: Simplify right side
    4,920,658.70x = 30,533,951,104,687.09
  5. Step 5: Solve for x
    x = 30,533,951,104,687.09/4,920,658.70
  6. Step 6: Final answer
    x = 6,205,256.85

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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.