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Finding the Fourth Proportional to 343,633.56, 515,651.20 and 143,936.96

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Solution

The fourth proportional to 343,633.56, 515,651.20 and 143,936.96 is: 215,989.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,633.56 : 515,651.20 = 143,936.96 : x
  2. Step 2: Convert to fraction form
    343,633.56/515,651.20 = 143,936.96/x
  3. Step 3: Cross multiply
    343,633.56x = 515,651.20 × 143,936.96
  4. Step 4: Simplify right side
    343,633.56x = 74,221,266,148.35
  5. Step 5: Solve for x
    x = 74,221,266,148.35/343,633.56
  6. Step 6: Final answer
    x = 215,989.57

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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.