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Finding the Fourth Proportional to 288.79, 433.11 and 83.32

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Solution

The fourth proportional to 288.79, 433.11 and 83.32 is: 124.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.79 : 433.11 = 83.32 : x
  2. Step 2: Convert to fraction form
    288.79/433.11 = 83.32/x
  3. Step 3: Cross multiply
    288.79x = 433.11 × 83.32
  4. Step 4: Simplify right side
    288.79x = 36,086.73
  5. Step 5: Solve for x
    x = 36,086.73/288.79
  6. Step 6: Final answer
    x = 124.96

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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.