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Finding the Fourth Proportional to 639.83, 882.87 and 377.87

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Solution

The fourth proportional to 639.83, 882.87 and 377.87 is: 521.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.83 : 882.87 = 377.87 : x
  2. Step 2: Convert to fraction form
    639.83/882.87 = 377.87/x
  3. Step 3: Cross multiply
    639.83x = 882.87 × 377.87
  4. Step 4: Simplify right side
    639.83x = 333,604.26
  5. Step 5: Solve for x
    x = 333,604.26/639.83
  6. Step 6: Final answer
    x = 521.39

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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.