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Finding the Fourth Proportional to 644.82, 884.37 and 618.36

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Solution

The fourth proportional to 644.82, 884.37 and 618.36 is: 848.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.82 : 884.37 = 618.36 : x
  2. Step 2: Convert to fraction form
    644.82/884.37 = 618.36/x
  3. Step 3: Cross multiply
    644.82x = 884.37 × 618.36
  4. Step 4: Simplify right side
    644.82x = 546,859.03
  5. Step 5: Solve for x
    x = 546,859.03/644.82
  6. Step 6: Final answer
    x = 848.08

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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.