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Finding the Fourth Proportional to 639.54, 882.36 and 377.51

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Solution

The fourth proportional to 639.54, 882.36 and 377.51 is: 520.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.54 : 882.36 = 377.51 : x
  2. Step 2: Convert to fraction form
    639.54/882.36 = 377.51/x
  3. Step 3: Cross multiply
    639.54x = 882.36 × 377.51
  4. Step 4: Simplify right side
    639.54x = 333,095.31
  5. Step 5: Solve for x
    x = 333,095.31/639.54
  6. Step 6: Final answer
    x = 520.84

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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.