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Finding the Fourth Proportional to 301.20, 415.64 and 170.20

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Solution

The fourth proportional to 301.20, 415.64 and 170.20 is: 234.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.20 : 415.64 = 170.20 : x
  2. Step 2: Convert to fraction form
    301.20/415.64 = 170.20/x
  3. Step 3: Cross multiply
    301.20x = 415.64 × 170.20
  4. Step 4: Simplify right side
    301.20x = 70,741.93
  5. Step 5: Solve for x
    x = 70,741.93/301.20
  6. Step 6: Final answer
    x = 234.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.