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Finding the Fourth Proportional to 391.56, 541.08 and 360.60

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Solution

The fourth proportional to 391.56, 541.08 and 360.60 is: 498.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.56 : 541.08 = 360.60 : x
  2. Step 2: Convert to fraction form
    391.56/541.08 = 360.60/x
  3. Step 3: Cross multiply
    391.56x = 541.08 × 360.60
  4. Step 4: Simplify right side
    391.56x = 195,113.45
  5. Step 5: Solve for x
    x = 195,113.45/391.56
  6. Step 6: Final answer
    x = 498.30

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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.