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Finding the Fourth Proportional to 621.39, 931.25 and 236.43

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Solution

The fourth proportional to 621.39, 931.25 and 236.43 is: 354.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.39 : 931.25 = 236.43 : x
  2. Step 2: Convert to fraction form
    621.39/931.25 = 236.43/x
  3. Step 3: Cross multiply
    621.39x = 931.25 × 236.43
  4. Step 4: Simplify right side
    621.39x = 220,174.26
  5. Step 5: Solve for x
    x = 220,174.26/621.39
  6. Step 6: Final answer
    x = 354.33

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.