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Finding the Fourth Proportional to 1,855,415.90, 2,783,123.85 and 1,855,415.90

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Solution

The fourth proportional to 1,855,415.90, 2,783,123.85 and 1,855,415.90 is: 2,783,123.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855,415.90 : 2,783,123.85 = 1,855,415.90 : x
  2. Step 2: Convert to fraction form
    1,855,415.90/2,783,123.85 = 1,855,415.90/x
  3. Step 3: Cross multiply
    1,855,415.90x = 2,783,123.85 × 1,855,415.90
  4. Step 4: Simplify right side
    1,855,415.90x = 5,163,852,242,959.22
  5. Step 5: Solve for x
    x = 5,163,852,242,959.22/1,855,415.90
  6. Step 6: Final answer
    x = 2,783,123.85

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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.