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Finding the Fourth Proportional to 280,218, 420,330.60 and 93,229.56

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Solution

The fourth proportional to 280,218, 420,330.60 and 93,229.56 is: 139,845.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,218 : 420,330.60 = 93,229.56 : x
  2. Step 2: Convert to fraction form
    280,218/420,330.60 = 93,229.56/x
  3. Step 3: Cross multiply
    280,218x = 420,330.60 × 93,229.56
  4. Step 4: Simplify right side
    280,218x = 39,187,236,892.54
  5. Step 5: Solve for x
    x = 39,187,236,892.54/280,218
  6. Step 6: Final answer
    x = 139,845.54

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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.