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Finding the Fourth Proportional to 643.15, 887.49 and 363.41

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Solution

The fourth proportional to 643.15, 887.49 and 363.41 is: 501.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.15 : 887.49 = 363.41 : x
  2. Step 2: Convert to fraction form
    643.15/887.49 = 363.41/x
  3. Step 3: Cross multiply
    643.15x = 887.49 × 363.41
  4. Step 4: Simplify right side
    643.15x = 322,519.64
  5. Step 5: Solve for x
    x = 322,519.64/643.15
  6. Step 6: Final answer
    x = 501.47

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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.