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Finding the Fourth Proportional to 303.42, 418.72 and 165.42

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Solution

The fourth proportional to 303.42, 418.72 and 165.42 is: 228.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.42 : 418.72 = 165.42 : x
  2. Step 2: Convert to fraction form
    303.42/418.72 = 165.42/x
  3. Step 3: Cross multiply
    303.42x = 418.72 × 165.42
  4. Step 4: Simplify right side
    303.42x = 69,265.86
  5. Step 5: Solve for x
    x = 69,265.86/303.42
  6. Step 6: Final answer
    x = 228.28

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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.