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Finding the Fourth Proportional to 288.94, 433.49 and 144.74

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Solution

The fourth proportional to 288.94, 433.49 and 144.74 is: 217.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.94 : 433.49 = 144.74 : x
  2. Step 2: Convert to fraction form
    288.94/433.49 = 144.74/x
  3. Step 3: Cross multiply
    288.94x = 433.49 × 144.74
  4. Step 4: Simplify right side
    288.94x = 62,743.34
  5. Step 5: Solve for x
    x = 62,743.34/288.94
  6. Step 6: Final answer
    x = 217.15

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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.