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Finding the Fourth Proportional to 639.89, 959.33 and 588.63

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Solution

The fourth proportional to 639.89, 959.33 and 588.63 is: 882.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.89 : 959.33 = 588.63 : x
  2. Step 2: Convert to fraction form
    639.89/959.33 = 588.63/x
  3. Step 3: Cross multiply
    639.89x = 959.33 × 588.63
  4. Step 4: Simplify right side
    639.89x = 564,687.47
  5. Step 5: Solve for x
    x = 564,687.47/639.89
  6. Step 6: Final answer
    x = 882.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.