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Finding the Fourth Proportional to 1,745.70, 2,408.91 and 959.79

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Solution

The fourth proportional to 1,745.70, 2,408.91 and 959.79 is: 1,324.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,745.70 : 2,408.91 = 959.79 : x
  2. Step 2: Convert to fraction form
    1,745.70/2,408.91 = 959.79/x
  3. Step 3: Cross multiply
    1,745.70x = 2,408.91 × 959.79
  4. Step 4: Simplify right side
    1,745.70x = 2,312,047.73
  5. Step 5: Solve for x
    x = 2,312,047.73/1,745.70
  6. Step 6: Final answer
    x = 1,324.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.