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Finding the Fourth Proportional to 621, 931.91 and 236.25

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Solution

The fourth proportional to 621, 931.91 and 236.25 is: 354.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    621 : 931.91 = 236.25 : x
  2. Step 2: Convert to fraction form
    621/931.91 = 236.25/x
  3. Step 3: Cross multiply
    621x = 931.91 × 236.25
  4. Step 4: Simplify right side
    621x = 220,162.56
  5. Step 5: Solve for x
    x = 220,162.56/621
  6. Step 6: Final answer
    x = 354.53

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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.