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Finding the Fourth Proportional to 620.50, 849.94 and 612.60

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Solution

The fourth proportional to 620.50, 849.94 and 612.60 is: 839.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.50 : 849.94 = 612.60 : x
  2. Step 2: Convert to fraction form
    620.50/849.94 = 612.60/x
  3. Step 3: Cross multiply
    620.50x = 849.94 × 612.60
  4. Step 4: Simplify right side
    620.50x = 520,665.93
  5. Step 5: Solve for x
    x = 520,665.93/620.50
  6. Step 6: Final answer
    x = 839.11

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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.