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Finding the Fourth Proportional to 3,478,991.40, 5,210,192.70 and 3,478,991.40

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Solution

The fourth proportional to 3,478,991.40, 5,210,192.70 and 3,478,991.40 is: 5,210,192.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478,991.40 : 5,210,192.70 = 3,478,991.40 : x
  2. Step 2: Convert to fraction form
    3,478,991.40/5,210,192.70 = 3,478,991.40/x
  3. Step 3: Cross multiply
    3,478,991.40x = 5,210,192.70 × 3,478,991.40
  4. Step 4: Simplify right side
    3,478,991.40x = 18,126,215,595,642.78
  5. Step 5: Solve for x
    x = 18,126,215,595,642.78/3,478,991.40
  6. Step 6: Final answer
    x = 5,210,192.70

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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.