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Finding the Fourth Proportional to 417.82, 626.76 and 109.68

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Solution

The fourth proportional to 417.82, 626.76 and 109.68 is: 164.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.82 : 626.76 = 109.68 : x
  2. Step 2: Convert to fraction form
    417.82/626.76 = 109.68/x
  3. Step 3: Cross multiply
    417.82x = 626.76 × 109.68
  4. Step 4: Simplify right side
    417.82x = 68,742.49
  5. Step 5: Solve for x
    x = 68,742.49/417.82
  6. Step 6: Final answer
    x = 164.53

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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.