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Finding the Fourth Proportional to 213.86, 295.70 and 165.12

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Solution

The fourth proportional to 213.86, 295.70 and 165.12 is: 228.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.86 : 295.70 = 165.12 : x
  2. Step 2: Convert to fraction form
    213.86/295.70 = 165.12/x
  3. Step 3: Cross multiply
    213.86x = 295.70 × 165.12
  4. Step 4: Simplify right side
    213.86x = 48,825.16
  5. Step 5: Solve for x
    x = 48,825.16/213.86
  6. Step 6: Final answer
    x = 228.31

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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.