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Finding the Fourth Proportional to 289.22, 433.88 and 144.95

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Solution

The fourth proportional to 289.22, 433.88 and 144.95 is: 217.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.22 : 433.88 = 144.95 : x
  2. Step 2: Convert to fraction form
    289.22/433.88 = 144.95/x
  3. Step 3: Cross multiply
    289.22x = 433.88 × 144.95
  4. Step 4: Simplify right side
    289.22x = 62,888.01
  5. Step 5: Solve for x
    x = 62,888.01/289.22
  6. Step 6: Final answer
    x = 217.44

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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.