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Finding the Fourth Proportional to 619.45, 849.93 and 613.64

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Solution

The fourth proportional to 619.45, 849.93 and 613.64 is: 841.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.45 : 849.93 = 613.64 : x
  2. Step 2: Convert to fraction form
    619.45/849.93 = 613.64/x
  3. Step 3: Cross multiply
    619.45x = 849.93 × 613.64
  4. Step 4: Simplify right side
    619.45x = 521,546.80
  5. Step 5: Solve for x
    x = 521,546.80/619.45
  6. Step 6: Final answer
    x = 841.96

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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.