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Finding the Fourth Proportional to 286.96, 430.09 and 132.67

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Solution

The fourth proportional to 286.96, 430.09 and 132.67 is: 198.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.96 : 430.09 = 132.67 : x
  2. Step 2: Convert to fraction form
    286.96/430.09 = 132.67/x
  3. Step 3: Cross multiply
    286.96x = 430.09 × 132.67
  4. Step 4: Simplify right side
    286.96x = 57,060.04
  5. Step 5: Solve for x
    x = 57,060.04/286.96
  6. Step 6: Final answer
    x = 198.84

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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.