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Finding the Fourth Proportional to 1,238,125.80, 1,734,557.10 and 1,238,125.80

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Solution

The fourth proportional to 1,238,125.80, 1,734,557.10 and 1,238,125.80 is: 1,734,557.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,125.80 : 1,734,557.10 = 1,238,125.80 : x
  2. Step 2: Convert to fraction form
    1,238,125.80/1,734,557.10 = 1,238,125.80/x
  3. Step 3: Cross multiply
    1,238,125.80x = 1,734,557.10 × 1,238,125.80
  4. Step 4: Simplify right side
    1,238,125.80x = 2,147,599,897,083.18
  5. Step 5: Solve for x
    x = 2,147,599,897,083.18/1,238,125.80
  6. Step 6: Final answer
    x = 1,734,557.10

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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.