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Finding the Fourth Proportional to 349.12, 523.60 and 156.88

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Solution

The fourth proportional to 349.12, 523.60 and 156.88 is: 235.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.12 : 523.60 = 156.88 : x
  2. Step 2: Convert to fraction form
    349.12/523.60 = 156.88/x
  3. Step 3: Cross multiply
    349.12x = 523.60 × 156.88
  4. Step 4: Simplify right side
    349.12x = 82,142.37
  5. Step 5: Solve for x
    x = 82,142.37/349.12
  6. Step 6: Final answer
    x = 235.28

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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.