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Finding the Fourth Proportional to 639.75, 882.86 and 377.93

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Solution

The fourth proportional to 639.75, 882.86 and 377.93 is: 521.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.75 : 882.86 = 377.93 : x
  2. Step 2: Convert to fraction form
    639.75/882.86 = 377.93/x
  3. Step 3: Cross multiply
    639.75x = 882.86 × 377.93
  4. Step 4: Simplify right side
    639.75x = 333,652.98
  5. Step 5: Solve for x
    x = 333,652.98/639.75
  6. Step 6: Final answer
    x = 521.54

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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.