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Finding the Fourth Proportional to 639.90, 883.00 and 440.94

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Solution

The fourth proportional to 639.90, 883.00 and 440.94 is: 608.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.90 : 883.00 = 440.94 : x
  2. Step 2: Convert to fraction form
    639.90/883.00 = 440.94/x
  3. Step 3: Cross multiply
    639.90x = 883.00 × 440.94
  4. Step 4: Simplify right side
    639.90x = 389,353.88
  5. Step 5: Solve for x
    x = 389,353.88/639.90
  6. Step 6: Final answer
    x = 608.46

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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.