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Finding the Fourth Proportional to 353.12, 529.36 and 136.88

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Solution

The fourth proportional to 353.12, 529.36 and 136.88 is: 205.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.12 : 529.36 = 136.88 : x
  2. Step 2: Convert to fraction form
    353.12/529.36 = 136.88/x
  3. Step 3: Cross multiply
    353.12x = 529.36 × 136.88
  4. Step 4: Simplify right side
    353.12x = 72,458.80
  5. Step 5: Solve for x
    x = 72,458.80/353.12
  6. Step 6: Final answer
    x = 205.20

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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.