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Finding the Fourth Proportional to 643.54, 888 and 363.76

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Solution

The fourth proportional to 643.54, 888 and 363.76 is: 501.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.54 : 888 = 363.76 : x
  2. Step 2: Convert to fraction form
    643.54/888 = 363.76/x
  3. Step 3: Cross multiply
    643.54x = 888 × 363.76
  4. Step 4: Simplify right side
    643.54x = 323,018.88
  5. Step 5: Solve for x
    x = 323,018.88/643.54
  6. Step 6: Final answer
    x = 501.94

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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.