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Finding the Fourth Proportional to 245.50, 338.85 and 142.06

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Solution

The fourth proportional to 245.50, 338.85 and 142.06 is: 196.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.50 : 338.85 = 142.06 : x
  2. Step 2: Convert to fraction form
    245.50/338.85 = 142.06/x
  3. Step 3: Cross multiply
    245.50x = 338.85 × 142.06
  4. Step 4: Simplify right side
    245.50x = 48,137.03
  5. Step 5: Solve for x
    x = 48,137.03/245.50
  6. Step 6: Final answer
    x = 196.08

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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.