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Finding the Fourth Proportional to 162.21, 222.66 and 153

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Solution

The fourth proportional to 162.21, 222.66 and 153 is: 210.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.21 : 222.66 = 153 : x
  2. Step 2: Convert to fraction form
    162.21/222.66 = 153/x
  3. Step 3: Cross multiply
    162.21x = 222.66 × 153
  4. Step 4: Simplify right side
    162.21x = 34,066.98
  5. Step 5: Solve for x
    x = 34,066.98/162.21
  6. Step 6: Final answer
    x = 210.02

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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.