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Finding the Fourth Proportional to 620.60, 931.10 and 230.72

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Solution

The fourth proportional to 620.60, 931.10 and 230.72 is: 346.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.60 : 931.10 = 230.72 : x
  2. Step 2: Convert to fraction form
    620.60/931.10 = 230.72/x
  3. Step 3: Cross multiply
    620.60x = 931.10 × 230.72
  4. Step 4: Simplify right side
    620.60x = 214,817.58
  5. Step 5: Solve for x
    x = 214,817.58/620.60
  6. Step 6: Final answer
    x = 346.15

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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.