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Finding the Fourth Proportional to 261.96, 393.18 and 132.03

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Solution

The fourth proportional to 261.96, 393.18 and 132.03 is: 198.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.96 : 393.18 = 132.03 : x
  2. Step 2: Convert to fraction form
    261.96/393.18 = 132.03/x
  3. Step 3: Cross multiply
    261.96x = 393.18 × 132.03
  4. Step 4: Simplify right side
    261.96x = 51,911.56
  5. Step 5: Solve for x
    x = 51,911.56/261.96
  6. Step 6: Final answer
    x = 198.17

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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.