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Finding the Fourth Proportional to 639.86, 958.56 and 444.46

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Solution

The fourth proportional to 639.86, 958.56 and 444.46 is: 665.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.86 : 958.56 = 444.46 : x
  2. Step 2: Convert to fraction form
    639.86/958.56 = 444.46/x
  3. Step 3: Cross multiply
    639.86x = 958.56 × 444.46
  4. Step 4: Simplify right side
    639.86x = 426,041.58
  5. Step 5: Solve for x
    x = 426,041.58/639.86
  6. Step 6: Final answer
    x = 665.84

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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.