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Finding the Fourth Proportional to 425,418.20, 638,127.30 and 414,920.60

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Solution

The fourth proportional to 425,418.20, 638,127.30 and 414,920.60 is: 622,380.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,418.20 : 638,127.30 = 414,920.60 : x
  2. Step 2: Convert to fraction form
    425,418.20/638,127.30 = 414,920.60/x
  3. Step 3: Cross multiply
    425,418.20x = 638,127.30 × 414,920.60
  4. Step 4: Simplify right side
    425,418.20x = 264,772,162,192.38
  5. Step 5: Solve for x
    x = 264,772,162,192.38/425,418.20
  6. Step 6: Final answer
    x = 622,380.90

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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.