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Finding the Fourth Proportional to 288.69, 433.21 and 126.34

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Solution

The fourth proportional to 288.69, 433.21 and 126.34 is: 189.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.69 : 433.21 = 126.34 : x
  2. Step 2: Convert to fraction form
    288.69/433.21 = 126.34/x
  3. Step 3: Cross multiply
    288.69x = 433.21 × 126.34
  4. Step 4: Simplify right side
    288.69x = 54,731.75
  5. Step 5: Solve for x
    x = 54,731.75/288.69
  6. Step 6: Final answer
    x = 189.59

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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.