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Finding the Fourth Proportional to 639.08, 960.30 and 350.72

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Solution

The fourth proportional to 639.08, 960.30 and 350.72 is: 527.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.08 : 960.30 = 350.72 : x
  2. Step 2: Convert to fraction form
    639.08/960.30 = 350.72/x
  3. Step 3: Cross multiply
    639.08x = 960.30 × 350.72
  4. Step 4: Simplify right side
    639.08x = 336,796.42
  5. Step 5: Solve for x
    x = 336,796.42/639.08
  6. Step 6: Final answer
    x = 527.00

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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.