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Finding the Fourth Proportional to 288.81, 433.49 and 134.85

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Solution

The fourth proportional to 288.81, 433.49 and 134.85 is: 202.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.81 : 433.49 = 134.85 : x
  2. Step 2: Convert to fraction form
    288.81/433.49 = 134.85/x
  3. Step 3: Cross multiply
    288.81x = 433.49 × 134.85
  4. Step 4: Simplify right side
    288.81x = 58,456.13
  5. Step 5: Solve for x
    x = 58,456.13/288.81
  6. Step 6: Final answer
    x = 202.40

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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.