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Finding the Fourth Proportional to 1,785.94, 2,679.44 and 745.41

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Solution

The fourth proportional to 1,785.94, 2,679.44 and 745.41 is: 1,118.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785.94 : 2,679.44 = 745.41 : x
  2. Step 2: Convert to fraction form
    1,785.94/2,679.44 = 745.41/x
  3. Step 3: Cross multiply
    1,785.94x = 2,679.44 × 745.41
  4. Step 4: Simplify right side
    1,785.94x = 1,997,281.37
  5. Step 5: Solve for x
    x = 1,997,281.37/1,785.94
  6. Step 6: Final answer
    x = 1,118.34

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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.