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Finding the Fourth Proportional to 162.96, 223.25 and 156.80

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Solution

The fourth proportional to 162.96, 223.25 and 156.80 is: 214.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.96 : 223.25 = 156.80 : x
  2. Step 2: Convert to fraction form
    162.96/223.25 = 156.80/x
  3. Step 3: Cross multiply
    162.96x = 223.25 × 156.80
  4. Step 4: Simplify right side
    162.96x = 35,004.88
  5. Step 5: Solve for x
    x = 35,004.88/162.96
  6. Step 6: Final answer
    x = 214.81

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.