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Finding the Fourth Proportional to 620.63, 931.31 and 230.57

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Solution

The fourth proportional to 620.63, 931.31 and 230.57 is: 345.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.63 : 931.31 = 230.57 : x
  2. Step 2: Convert to fraction form
    620.63/931.31 = 230.57/x
  3. Step 3: Cross multiply
    620.63x = 931.31 × 230.57
  4. Step 4: Simplify right side
    620.63x = 214,726.34
  5. Step 5: Solve for x
    x = 214,726.34/620.63
  6. Step 6: Final answer
    x = 345.98

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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.