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Finding the Fourth Proportional to 2,693.69, 4,040.54 and 745.91

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Solution

The fourth proportional to 2,693.69, 4,040.54 and 745.91 is: 1,118.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,693.69 : 4,040.54 = 745.91 : x
  2. Step 2: Convert to fraction form
    2,693.69/4,040.54 = 745.91/x
  3. Step 3: Cross multiply
    2,693.69x = 4,040.54 × 745.91
  4. Step 4: Simplify right side
    2,693.69x = 3,013,875.46
  5. Step 5: Solve for x
    x = 3,013,875.46/2,693.69
  6. Step 6: Final answer
    x = 1,118.87

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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.