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Finding the Fourth Proportional to 3,618.52, 4,989.18 and 3,058

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Solution

The fourth proportional to 3,618.52, 4,989.18 and 3,058 is: 4,216.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.52 : 4,989.18 = 3,058 : x
  2. Step 2: Convert to fraction form
    3,618.52/4,989.18 = 3,058/x
  3. Step 3: Cross multiply
    3,618.52x = 4,989.18 × 3,058
  4. Step 4: Simplify right side
    3,618.52x = 15,256,912.44
  5. Step 5: Solve for x
    x = 15,256,912.44/3,618.52
  6. Step 6: Final answer
    x = 4,216.34

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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.