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Finding the Fourth Proportional to 643.48, 888.06 and 377.97

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Solution

The fourth proportional to 643.48, 888.06 and 377.97 is: 521.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.48 : 888.06 = 377.97 : x
  2. Step 2: Convert to fraction form
    643.48/888.06 = 377.97/x
  3. Step 3: Cross multiply
    643.48x = 888.06 × 377.97
  4. Step 4: Simplify right side
    643.48x = 335,658.13
  5. Step 5: Solve for x
    x = 335,658.13/643.48
  6. Step 6: Final answer
    x = 521.63

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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.