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Finding the Fourth Proportional to 343,791.70, 515,760.45 and 103,885.90

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Solution

The fourth proportional to 343,791.70, 515,760.45 and 103,885.90 is: 155,850.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,791.70 : 515,760.45 = 103,885.90 : x
  2. Step 2: Convert to fraction form
    343,791.70/515,760.45 = 103,885.90/x
  3. Step 3: Cross multiply
    343,791.70x = 515,760.45 × 103,885.90
  4. Step 4: Simplify right side
    343,791.70x = 53,580,238,532.66
  5. Step 5: Solve for x
    x = 53,580,238,532.66/343,791.70
  6. Step 6: Final answer
    x = 155,850.88

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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.