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Finding the Fourth Proportional to 620.89, 931.48 and 230.90

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Solution

The fourth proportional to 620.89, 931.48 and 230.90 is: 346.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.89 : 931.48 = 230.90 : x
  2. Step 2: Convert to fraction form
    620.89/931.48 = 230.90/x
  3. Step 3: Cross multiply
    620.89x = 931.48 × 230.90
  4. Step 4: Simplify right side
    620.89x = 215,079.17
  5. Step 5: Solve for x
    x = 215,079.17/620.89
  6. Step 6: Final answer
    x = 346.41

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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.