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Finding the Fourth Proportional to 639.06, 958.61 and 176.87

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Solution

The fourth proportional to 639.06, 958.61 and 176.87 is: 265.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.06 : 958.61 = 176.87 : x
  2. Step 2: Convert to fraction form
    639.06/958.61 = 176.87/x
  3. Step 3: Cross multiply
    639.06x = 958.61 × 176.87
  4. Step 4: Simplify right side
    639.06x = 169,551.86
  5. Step 5: Solve for x
    x = 169,551.86/639.06
  6. Step 6: Final answer
    x = 265.32

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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.