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Finding the Fourth Proportional to 165.36, 228.32 and 156.24

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Solution

The fourth proportional to 165.36, 228.32 and 156.24 is: 215.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.36 : 228.32 = 156.24 : x
  2. Step 2: Convert to fraction form
    165.36/228.32 = 156.24/x
  3. Step 3: Cross multiply
    165.36x = 228.32 × 156.24
  4. Step 4: Simplify right side
    165.36x = 35,672.72
  5. Step 5: Solve for x
    x = 35,672.72/165.36
  6. Step 6: Final answer
    x = 215.73

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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.