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Finding the Fourth Proportional to 475.14, 712.31 and 186.38

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Solution

The fourth proportional to 475.14, 712.31 and 186.38 is: 279.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.14 : 712.31 = 186.38 : x
  2. Step 2: Convert to fraction form
    475.14/712.31 = 186.38/x
  3. Step 3: Cross multiply
    475.14x = 712.31 × 186.38
  4. Step 4: Simplify right side
    475.14x = 132,755.84
  5. Step 5: Solve for x
    x = 132,755.84/475.14
  6. Step 6: Final answer
    x = 279.40

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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.