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Finding the Fourth Proportional to 343,568.40, 515,505.72 and 133,222.56

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Solution

The fourth proportional to 343,568.40, 515,505.72 and 133,222.56 is: 199,893.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,568.40 : 515,505.72 = 133,222.56 : x
  2. Step 2: Convert to fraction form
    343,568.40/515,505.72 = 133,222.56/x
  3. Step 3: Cross multiply
    343,568.40x = 515,505.72 × 133,222.56
  4. Step 4: Simplify right side
    343,568.40x = 68,676,991,713.04
  5. Step 5: Solve for x
    x = 68,676,991,713.04/343,568.40
  6. Step 6: Final answer
    x = 199,893.21

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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.