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Finding the Fourth Proportional to 639.14, 881.81 and 373.62

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Solution

The fourth proportional to 639.14, 881.81 and 373.62 is: 515.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.14 : 881.81 = 373.62 : x
  2. Step 2: Convert to fraction form
    639.14/881.81 = 373.62/x
  3. Step 3: Cross multiply
    639.14x = 881.81 × 373.62
  4. Step 4: Simplify right side
    639.14x = 329,461.85
  5. Step 5: Solve for x
    x = 329,461.85/639.14
  6. Step 6: Final answer
    x = 515.48

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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.