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Finding the Fourth Proportional to 639.85, 883.00 and 377.87

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Solution

The fourth proportional to 639.85, 883.00 and 377.87 is: 521.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.85 : 883.00 = 377.87 : x
  2. Step 2: Convert to fraction form
    639.85/883.00 = 377.87/x
  3. Step 3: Cross multiply
    639.85x = 883.00 × 377.87
  4. Step 4: Simplify right side
    639.85x = 333,655.27
  5. Step 5: Solve for x
    x = 333,655.27/639.85
  6. Step 6: Final answer
    x = 521.46

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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.