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Finding the Fourth Proportional to 639.07, 958.51 and 176.75

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Solution

The fourth proportional to 639.07, 958.51 and 176.75 is: 265.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.07 : 958.51 = 176.75 : x
  2. Step 2: Convert to fraction form
    639.07/958.51 = 176.75/x
  3. Step 3: Cross multiply
    639.07x = 958.51 × 176.75
  4. Step 4: Simplify right side
    639.07x = 169,416.64
  5. Step 5: Solve for x
    x = 169,416.64/639.07
  6. Step 6: Final answer
    x = 265.10

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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.