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Finding the Fourth Proportional to 425,426.20, 638,139.30 and 414,928.60

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Solution

The fourth proportional to 425,426.20, 638,139.30 and 414,928.60 is: 622,392.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,426.20 : 638,139.30 = 414,928.60 : x
  2. Step 2: Convert to fraction form
    425,426.20/638,139.30 = 414,928.60/x
  3. Step 3: Cross multiply
    425,426.20x = 638,139.30 × 414,928.60
  4. Step 4: Simplify right side
    425,426.20x = 264,782,246,353.98
  5. Step 5: Solve for x
    x = 264,782,246,353.98/425,426.20
  6. Step 6: Final answer
    x = 622,392.90

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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.