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Finding the Fourth Proportional to 620.88, 935.93 and 513.96

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Solution

The fourth proportional to 620.88, 935.93 and 513.96 is: 774.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.88 : 935.93 = 513.96 : x
  2. Step 2: Convert to fraction form
    620.88/935.93 = 513.96/x
  3. Step 3: Cross multiply
    620.88x = 935.93 × 513.96
  4. Step 4: Simplify right side
    620.88x = 481,028.01
  5. Step 5: Solve for x
    x = 481,028.01/620.88
  6. Step 6: Final answer
    x = 774.75

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.