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Finding the Fourth Proportional to 627.44, 939.77 and 517.51

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Solution

The fourth proportional to 627.44, 939.77 and 517.51 is: 775.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.44 : 939.77 = 517.51 : x
  2. Step 2: Convert to fraction form
    627.44/939.77 = 517.51/x
  3. Step 3: Cross multiply
    627.44x = 939.77 × 517.51
  4. Step 4: Simplify right side
    627.44x = 486,342.84
  5. Step 5: Solve for x
    x = 486,342.84/627.44
  6. Step 6: Final answer
    x = 775.13

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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.