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Finding the Fourth Proportional to 425,245.02, 638,023.05 and 144,790.62

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Solution

The fourth proportional to 425,245.02, 638,023.05 and 144,790.62 is: 217,238.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,245.02 : 638,023.05 = 144,790.62 : x
  2. Step 2: Convert to fraction form
    425,245.02/638,023.05 = 144,790.62/x
  3. Step 3: Cross multiply
    425,245.02x = 638,023.05 × 144,790.62
  4. Step 4: Simplify right side
    425,245.02x = 92,379,752,983.79
  5. Step 5: Solve for x
    x = 92,379,752,983.79/425,245.02
  6. Step 6: Final answer
    x = 217,238.88

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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.