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Finding the Fourth Proportional to 289.97, 400.16 and 165.63

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Solution

The fourth proportional to 289.97, 400.16 and 165.63 is: 228.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.97 : 400.16 = 165.63 : x
  2. Step 2: Convert to fraction form
    289.97/400.16 = 165.63/x
  3. Step 3: Cross multiply
    289.97x = 400.16 × 165.63
  4. Step 4: Simplify right side
    289.97x = 66,277.67
  5. Step 5: Solve for x
    x = 66,277.67/289.97
  6. Step 6: Final answer
    x = 228.57

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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.