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Finding the Fourth Proportional to 165.81, 228.66 and 153.89

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Solution

The fourth proportional to 165.81, 228.66 and 153.89 is: 212.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.81 : 228.66 = 153.89 : x
  2. Step 2: Convert to fraction form
    165.81/228.66 = 153.89/x
  3. Step 3: Cross multiply
    165.81x = 228.66 × 153.89
  4. Step 4: Simplify right side
    165.81x = 35,187.34
  5. Step 5: Solve for x
    x = 35,187.34/165.81
  6. Step 6: Final answer
    x = 212.21

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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.