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Finding the Fourth Proportional to 639.19, 958.23 and 364.91

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Solution

The fourth proportional to 639.19, 958.23 and 364.91 is: 547.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.19 : 958.23 = 364.91 : x
  2. Step 2: Convert to fraction form
    639.19/958.23 = 364.91/x
  3. Step 3: Cross multiply
    639.19x = 958.23 × 364.91
  4. Step 4: Simplify right side
    639.19x = 349,662.92
  5. Step 5: Solve for x
    x = 349,662.92/639.19
  6. Step 6: Final answer
    x = 547.04

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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.