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Finding the Fourth Proportional to 207.43, 310.80 and 126.03

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Solution

The fourth proportional to 207.43, 310.80 and 126.03 is: 188.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.43 : 310.80 = 126.03 : x
  2. Step 2: Convert to fraction form
    207.43/310.80 = 126.03/x
  3. Step 3: Cross multiply
    207.43x = 310.80 × 126.03
  4. Step 4: Simplify right side
    207.43x = 39,170.12
  5. Step 5: Solve for x
    x = 39,170.12/207.43
  6. Step 6: Final answer
    x = 188.84

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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.