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Finding the Fourth Proportional to 288.94, 433.63 and 126.74

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Solution

The fourth proportional to 288.94, 433.63 and 126.74 is: 190.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.94 : 433.63 = 126.74 : x
  2. Step 2: Convert to fraction form
    288.94/433.63 = 126.74/x
  3. Step 3: Cross multiply
    288.94x = 433.63 × 126.74
  4. Step 4: Simplify right side
    288.94x = 54,958.27
  5. Step 5: Solve for x
    x = 54,958.27/288.94
  6. Step 6: Final answer
    x = 190.21

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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.