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Finding the Fourth Proportional to 339,212.35, 508,832.36 and 86,499.39

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Solution

The fourth proportional to 339,212.35, 508,832.36 and 86,499.39 is: 129,752.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,212.35 : 508,832.36 = 86,499.39 : x
  2. Step 2: Convert to fraction form
    339,212.35/508,832.36 = 86,499.39/x
  3. Step 3: Cross multiply
    339,212.35x = 508,832.36 × 86,499.39
  4. Step 4: Simplify right side
    339,212.35x = 44,013,688,968.51
  5. Step 5: Solve for x
    x = 44,013,688,968.51/339,212.35
  6. Step 6: Final answer
    x = 129,752.61

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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.