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Finding the Fourth Proportional to 165.50, 248.62 and 153.98

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Solution

The fourth proportional to 165.50, 248.62 and 153.98 is: 231.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.50 : 248.62 = 153.98 : x
  2. Step 2: Convert to fraction form
    165.50/248.62 = 153.98/x
  3. Step 3: Cross multiply
    165.50x = 248.62 × 153.98
  4. Step 4: Simplify right side
    165.50x = 38,282.51
  5. Step 5: Solve for x
    x = 38,282.51/165.50
  6. Step 6: Final answer
    x = 231.31

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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.