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Finding the Fourth Proportional to 613.97, 918.89 and 563.39

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Solution

The fourth proportional to 613.97, 918.89 and 563.39 is: 843.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.97 : 918.89 = 563.39 : x
  2. Step 2: Convert to fraction form
    613.97/918.89 = 563.39/x
  3. Step 3: Cross multiply
    613.97x = 918.89 × 563.39
  4. Step 4: Simplify right side
    613.97x = 517,686.03
  5. Step 5: Solve for x
    x = 517,686.03/613.97
  6. Step 6: Final answer
    x = 843.18

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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.