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Finding the Fourth Proportional to 639.19, 882.36 and 377.23

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Solution

The fourth proportional to 639.19, 882.36 and 377.23 is: 520.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.19 : 882.36 = 377.23 : x
  2. Step 2: Convert to fraction form
    639.19/882.36 = 377.23/x
  3. Step 3: Cross multiply
    639.19x = 882.36 × 377.23
  4. Step 4: Simplify right side
    639.19x = 332,852.66
  5. Step 5: Solve for x
    x = 332,852.66/639.19
  6. Step 6: Final answer
    x = 520.74

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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.