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Finding the Fourth Proportional to 3,658.45, 5,040.79 and 3,058.87

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Solution

The fourth proportional to 3,658.45, 5,040.79 and 3,058.87 is: 4,214.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,658.45 : 5,040.79 = 3,058.87 : x
  2. Step 2: Convert to fraction form
    3,658.45/5,040.79 = 3,058.87/x
  3. Step 3: Cross multiply
    3,658.45x = 5,040.79 × 3,058.87
  4. Step 4: Simplify right side
    3,658.45x = 15,419,121.31
  5. Step 5: Solve for x
    x = 15,419,121.31/3,658.45
  6. Step 6: Final answer
    x = 4,214.66

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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.