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Finding the Fourth Proportional to 245.45, 368.34 and 108.42

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Solution

The fourth proportional to 245.45, 368.34 and 108.42 is: 162.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.45 : 368.34 = 108.42 : x
  2. Step 2: Convert to fraction form
    245.45/368.34 = 108.42/x
  3. Step 3: Cross multiply
    245.45x = 368.34 × 108.42
  4. Step 4: Simplify right side
    245.45x = 39,935.42
  5. Step 5: Solve for x
    x = 39,935.42/245.45
  6. Step 6: Final answer
    x = 162.71

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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.