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Finding the Fourth Proportional to 153, 211.29 and 108.84

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Solution

The fourth proportional to 153, 211.29 and 108.84 is: 150.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    153 : 211.29 = 108.84 : x
  2. Step 2: Convert to fraction form
    153/211.29 = 108.84/x
  3. Step 3: Cross multiply
    153x = 211.29 × 108.84
  4. Step 4: Simplify right side
    153x = 22,996.80
  5. Step 5: Solve for x
    x = 22,996.80/153
  6. Step 6: Final answer
    x = 150.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.