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Finding the Fourth Proportional to 323,974.78, 485,929.36 and 87,341.38

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Solution

The fourth proportional to 323,974.78, 485,929.36 and 87,341.38 is: 131,003.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,974.78 : 485,929.36 = 87,341.38 : x
  2. Step 2: Convert to fraction form
    323,974.78/485,929.36 = 87,341.38/x
  3. Step 3: Cross multiply
    323,974.78x = 485,929.36 × 87,341.38
  4. Step 4: Simplify right side
    323,974.78x = 42,441,740,059.15
  5. Step 5: Solve for x
    x = 42,441,740,059.15/323,974.78
  6. Step 6: Final answer
    x = 131,003.22

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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.