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Finding the Fourth Proportional to 397,239.20, 595,858.80 and 394,474.40

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Solution

The fourth proportional to 397,239.20, 595,858.80 and 394,474.40 is: 591,711.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,239.20 : 595,858.80 = 394,474.40 : x
  2. Step 2: Convert to fraction form
    397,239.20/595,858.80 = 394,474.40/x
  3. Step 3: Cross multiply
    397,239.20x = 595,858.80 × 394,474.40
  4. Step 4: Simplify right side
    397,239.20x = 235,051,042,614.72
  5. Step 5: Solve for x
    x = 235,051,042,614.72/397,239.20
  6. Step 6: Final answer
    x = 591,711.60

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Double scale
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Similar ratio
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1.5x scale

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.