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Finding the Fourth Proportional to 343.14, 514.40 and 126.68

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Solution

The fourth proportional to 343.14, 514.40 and 126.68 is: 189.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.14 : 514.40 = 126.68 : x
  2. Step 2: Convert to fraction form
    343.14/514.40 = 126.68/x
  3. Step 3: Cross multiply
    343.14x = 514.40 × 126.68
  4. Step 4: Simplify right side
    343.14x = 65,164.19
  5. Step 5: Solve for x
    x = 65,164.19/343.14
  6. Step 6: Final answer
    x = 189.91

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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.