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Finding the Fourth Proportional to 417.88, 626.46 and 186.56

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Solution

The fourth proportional to 417.88, 626.46 and 186.56 is: 279.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.88 : 626.46 = 186.56 : x
  2. Step 2: Convert to fraction form
    417.88/626.46 = 186.56/x
  3. Step 3: Cross multiply
    417.88x = 626.46 × 186.56
  4. Step 4: Simplify right side
    417.88x = 116,872.38
  5. Step 5: Solve for x
    x = 116,872.38/417.88
  6. Step 6: Final answer
    x = 279.68

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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.