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Finding the Fourth Proportional to 394,958.40, 592,437.60 and 253,240.80

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Solution

The fourth proportional to 394,958.40, 592,437.60 and 253,240.80 is: 379,861.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,958.40 : 592,437.60 = 253,240.80 : x
  2. Step 2: Convert to fraction form
    394,958.40/592,437.60 = 253,240.80/x
  3. Step 3: Cross multiply
    394,958.40x = 592,437.60 × 253,240.80
  4. Step 4: Simplify right side
    394,958.40x = 150,029,371,774.08
  5. Step 5: Solve for x
    x = 150,029,371,774.08/394,958.40
  6. Step 6: Final answer
    x = 379,861.20

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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.