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Finding the Fourth Proportional to 418.85, 628.27 and 162.35

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Solution

The fourth proportional to 418.85, 628.27 and 162.35 is: 243.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.85 : 628.27 = 162.35 : x
  2. Step 2: Convert to fraction form
    418.85/628.27 = 162.35/x
  3. Step 3: Cross multiply
    418.85x = 628.27 × 162.35
  4. Step 4: Simplify right side
    418.85x = 101,999.63
  5. Step 5: Solve for x
    x = 101,999.63/418.85
  6. Step 6: Final answer
    x = 243.52

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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.