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Finding the Fourth Proportional to 620.16, 850.56 and 605.76

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Solution

The fourth proportional to 620.16, 850.56 and 605.76 is: 830.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.16 : 850.56 = 605.76 : x
  2. Step 2: Convert to fraction form
    620.16/850.56 = 605.76/x
  3. Step 3: Cross multiply
    620.16x = 850.56 × 605.76
  4. Step 4: Simplify right side
    620.16x = 515,235.23
  5. Step 5: Solve for x
    x = 515,235.23/620.16
  6. Step 6: Final answer
    x = 830.81

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.