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Finding the Fourth Proportional to 418.05, 627.05 and 186.79

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Solution

The fourth proportional to 418.05, 627.05 and 186.79 is: 280.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.05 : 627.05 = 186.79 : x
  2. Step 2: Convert to fraction form
    418.05/627.05 = 186.79/x
  3. Step 3: Cross multiply
    418.05x = 627.05 × 186.79
  4. Step 4: Simplify right side
    418.05x = 117,125.74
  5. Step 5: Solve for x
    x = 117,125.74/418.05
  6. Step 6: Final answer
    x = 280.17

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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.