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Finding the Fourth Proportional to 245.67, 339 and 135.12

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Solution

The fourth proportional to 245.67, 339 and 135.12 is: 186.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.67 : 339 = 135.12 : x
  2. Step 2: Convert to fraction form
    245.67/339 = 135.12/x
  3. Step 3: Cross multiply
    245.67x = 339 × 135.12
  4. Step 4: Simplify right side
    245.67x = 45,805.68
  5. Step 5: Solve for x
    x = 45,805.68/245.67
  6. Step 6: Final answer
    x = 186.45

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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.