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Finding the Fourth Proportional to 5,479,939.60, 7,688,711.60 and 5,479,939.60

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Solution

The fourth proportional to 5,479,939.60, 7,688,711.60 and 5,479,939.60 is: 7,688,711.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479,939.60 : 7,688,711.60 = 5,479,939.60 : x
  2. Step 2: Convert to fraction form
    5,479,939.60/7,688,711.60 = 5,479,939.60/x
  3. Step 3: Cross multiply
    5,479,939.60x = 7,688,711.60 × 5,479,939.60
  4. Step 4: Simplify right side
    5,479,939.60x = 42,133,675,169,819.35
  5. Step 5: Solve for x
    x = 42,133,675,169,819.35/5,479,939.60
  6. Step 6: Final answer
    x = 7,688,711.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.