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Finding the Fourth Proportional to 620.28, 927.90 and 517.77

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Solution

The fourth proportional to 620.28, 927.90 and 517.77 is: 774.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.28 : 927.90 = 517.77 : x
  2. Step 2: Convert to fraction form
    620.28/927.90 = 517.77/x
  3. Step 3: Cross multiply
    620.28x = 927.90 × 517.77
  4. Step 4: Simplify right side
    620.28x = 480,438.78
  5. Step 5: Solve for x
    x = 480,438.78/620.28
  6. Step 6: Final answer
    x = 774.55

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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.