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Finding the Fourth Proportional to 343,403.10, 515,212.65 and 165,915.90

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Solution

The fourth proportional to 343,403.10, 515,212.65 and 165,915.90 is: 248,926.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,403.10 : 515,212.65 = 165,915.90 : x
  2. Step 2: Convert to fraction form
    343,403.10/515,212.65 = 165,915.90/x
  3. Step 3: Cross multiply
    343,403.10x = 515,212.65 × 165,915.90
  4. Step 4: Simplify right side
    343,403.10x = 85,481,970,516.14
  5. Step 5: Solve for x
    x = 85,481,970,516.14/343,403.10
  6. Step 6: Final answer
    x = 248,926.03

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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.