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Finding the Fourth Proportional to 425,701.45, 638,367.10 and 122,028.73

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Solution

The fourth proportional to 425,701.45, 638,367.10 and 122,028.73 is: 182,990.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,701.45 : 638,367.10 = 122,028.73 : x
  2. Step 2: Convert to fraction form
    425,701.45/638,367.10 = 122,028.73/x
  3. Step 3: Cross multiply
    425,701.45x = 638,367.10 × 122,028.73
  4. Step 4: Simplify right side
    425,701.45x = 77,899,124,929.00
  5. Step 5: Solve for x
    x = 77,899,124,929.00/425,701.45
  6. Step 6: Final answer
    x = 182,990.04

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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.