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Finding the Fourth Proportional to 620.45, 930.67 and 254.98

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Solution

The fourth proportional to 620.45, 930.67 and 254.98 is: 382.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.45 : 930.67 = 254.98 : x
  2. Step 2: Convert to fraction form
    620.45/930.67 = 254.98/x
  3. Step 3: Cross multiply
    620.45x = 930.67 × 254.98
  4. Step 4: Simplify right side
    620.45x = 237,302.24
  5. Step 5: Solve for x
    x = 237,302.24/620.45
  6. Step 6: Final answer
    x = 382.47

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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.