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Finding the Fourth Proportional to 245.42, 367.92 and 115.35

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Solution

The fourth proportional to 245.42, 367.92 and 115.35 is: 172.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.42 : 367.92 = 115.35 : x
  2. Step 2: Convert to fraction form
    245.42/367.92 = 115.35/x
  3. Step 3: Cross multiply
    245.42x = 367.92 × 115.35
  4. Step 4: Simplify right side
    245.42x = 42,439.57
  5. Step 5: Solve for x
    x = 42,439.57/245.42
  6. Step 6: Final answer
    x = 172.93

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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.