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Finding the Fourth Proportional to 394,353.90, 591,676.65 and 128,123.10

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Solution

The fourth proportional to 394,353.90, 591,676.65 and 128,123.10 is: 192,232.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,353.90 : 591,676.65 = 128,123.10 : x
  2. Step 2: Convert to fraction form
    394,353.90/591,676.65 = 128,123.10/x
  3. Step 3: Cross multiply
    394,353.90x = 591,676.65 × 128,123.10
  4. Step 4: Simplify right side
    394,353.90x = 75,807,446,595.62
  5. Step 5: Solve for x
    x = 75,807,446,595.62/394,353.90
  6. Step 6: Final answer
    x = 192,232.02

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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.