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Finding the Fourth Proportional to 475.28, 712.58 and 186.66

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Solution

The fourth proportional to 475.28, 712.58 and 186.66 is: 279.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.28 : 712.58 = 186.66 : x
  2. Step 2: Convert to fraction form
    475.28/712.58 = 186.66/x
  3. Step 3: Cross multiply
    475.28x = 712.58 × 186.66
  4. Step 4: Simplify right side
    475.28x = 133,010.18
  5. Step 5: Solve for x
    x = 133,010.18/475.28
  6. Step 6: Final answer
    x = 279.86

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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.