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Finding the Fourth Proportional to 621.36, 931.92 and 236.48

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Solution

The fourth proportional to 621.36, 931.92 and 236.48 is: 354.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.36 : 931.92 = 236.48 : x
  2. Step 2: Convert to fraction form
    621.36/931.92 = 236.48/x
  3. Step 3: Cross multiply
    621.36x = 931.92 × 236.48
  4. Step 4: Simplify right side
    621.36x = 220,380.44
  5. Step 5: Solve for x
    x = 220,380.44/621.36
  6. Step 6: Final answer
    x = 354.67

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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.