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Finding the Fourth Proportional to 639.92, 959.06 and 593.76

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Solution

The fourth proportional to 639.92, 959.06 and 593.76 is: 889.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.92 : 959.06 = 593.76 : x
  2. Step 2: Convert to fraction form
    639.92/959.06 = 593.76/x
  3. Step 3: Cross multiply
    639.92x = 959.06 × 593.76
  4. Step 4: Simplify right side
    639.92x = 569,451.47
  5. Step 5: Solve for x
    x = 569,451.47/639.92
  6. Step 6: Final answer
    x = 889.88

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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.