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Finding the Fourth Proportional to 289.69, 433.05 and 216.52

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Solution

The fourth proportional to 289.69, 433.05 and 216.52 is: 323.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.69 : 433.05 = 216.52 : x
  2. Step 2: Convert to fraction form
    289.69/433.05 = 216.52/x
  3. Step 3: Cross multiply
    289.69x = 433.05 × 216.52
  4. Step 4: Simplify right side
    289.69x = 93,763.99
  5. Step 5: Solve for x
    x = 93,763.99/289.69
  6. Step 6: Final answer
    x = 323.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.