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Finding the Fourth Proportional to 394,595.80, 591,893.70 and 145,245.40

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Solution

The fourth proportional to 394,595.80, 591,893.70 and 145,245.40 is: 217,868.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,595.80 : 591,893.70 = 145,245.40 : x
  2. Step 2: Convert to fraction form
    394,595.80/591,893.70 = 145,245.40/x
  3. Step 3: Cross multiply
    394,595.80x = 591,893.70 × 145,245.40
  4. Step 4: Simplify right side
    394,595.80x = 85,969,837,213.98
  5. Step 5: Solve for x
    x = 85,969,837,213.98/394,595.80
  6. Step 6: Final answer
    x = 217,868.10

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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.