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Finding the Fourth Proportional to 289.57, 433.79 and 274.81

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Solution

The fourth proportional to 289.57, 433.79 and 274.81 is: 411.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.57 : 433.79 = 274.81 : x
  2. Step 2: Convert to fraction form
    289.57/433.79 = 274.81/x
  3. Step 3: Cross multiply
    289.57x = 433.79 × 274.81
  4. Step 4: Simplify right side
    289.57x = 119,208.46
  5. Step 5: Solve for x
    x = 119,208.46/289.57
  6. Step 6: Final answer
    x = 411.67

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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.