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Finding the Fourth Proportional to 643.57, 888.06 and 363.79

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Solution

The fourth proportional to 643.57, 888.06 and 363.79 is: 501.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.57 : 888.06 = 363.79 : x
  2. Step 2: Convert to fraction form
    643.57/888.06 = 363.79/x
  3. Step 3: Cross multiply
    643.57x = 888.06 × 363.79
  4. Step 4: Simplify right side
    643.57x = 323,067.35
  5. Step 5: Solve for x
    x = 323,067.35/643.57
  6. Step 6: Final answer
    x = 501.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.