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Finding the Fourth Proportional to 420,342, 579,992.60 and 250,591.92

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Solution

The fourth proportional to 420,342, 579,992.60 and 250,591.92 is: 345,769.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,342 : 579,992.60 = 250,591.92 : x
  2. Step 2: Convert to fraction form
    420,342/579,992.60 = 250,591.92/x
  3. Step 3: Cross multiply
    420,342x = 579,992.60 × 250,591.92
  4. Step 4: Simplify right side
    420,342x = 145,341,459,219.79
  5. Step 5: Solve for x
    x = 145,341,459,219.79/420,342
  6. Step 6: Final answer
    x = 345,769.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.