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Finding the Fourth Proportional to 289.11, 433.68 and 274.53

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Solution

The fourth proportional to 289.11, 433.68 and 274.53 is: 411.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.11 : 433.68 = 274.53 : x
  2. Step 2: Convert to fraction form
    289.11/433.68 = 274.53/x
  3. Step 3: Cross multiply
    289.11x = 433.68 × 274.53
  4. Step 4: Simplify right side
    289.11x = 119,058.17
  5. Step 5: Solve for x
    x = 119,058.17/289.11
  6. Step 6: Final answer
    x = 411.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.