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Finding the Fourth Proportional to 640.16, 959.12 and 350.88

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Solution

The fourth proportional to 640.16, 959.12 and 350.88 is: 525.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.16 : 959.12 = 350.88 : x
  2. Step 2: Convert to fraction form
    640.16/959.12 = 350.88/x
  3. Step 3: Cross multiply
    640.16x = 959.12 × 350.88
  4. Step 4: Simplify right side
    640.16x = 336,536.03
  5. Step 5: Solve for x
    x = 336,536.03/640.16
  6. Step 6: Final answer
    x = 525.71

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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.