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Finding the Fourth Proportional to 425,903.67, 638,717.21 and 141,517.85

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Solution

The fourth proportional to 425,903.67, 638,717.21 and 141,517.85 is: 212,230.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,903.67 : 638,717.21 = 141,517.85 : x
  2. Step 2: Convert to fraction form
    425,903.67/638,717.21 = 141,517.85/x
  3. Step 3: Cross multiply
    425,903.67x = 638,717.21 × 141,517.85
  4. Step 4: Simplify right side
    425,903.67x = 90,389,882,416.02
  5. Step 5: Solve for x
    x = 90,389,882,416.02/425,903.67
  6. Step 6: Final answer
    x = 212,230.81

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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.