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Finding the Fourth Proportional to 418.91, 628.48 and 175.44

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Solution

The fourth proportional to 418.91, 628.48 and 175.44 is: 263.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.91 : 628.48 = 175.44 : x
  2. Step 2: Convert to fraction form
    418.91/628.48 = 175.44/x
  3. Step 3: Cross multiply
    418.91x = 628.48 × 175.44
  4. Step 4: Simplify right side
    418.91x = 110,260.53
  5. Step 5: Solve for x
    x = 110,260.53/418.91
  6. Step 6: Final answer
    x = 263.21

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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.