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Finding the Fourth Proportional to 425,469.60, 638,204.40 and 308,246.40

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Solution

The fourth proportional to 425,469.60, 638,204.40 and 308,246.40 is: 462,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,469.60 : 638,204.40 = 308,246.40 : x
  2. Step 2: Convert to fraction form
    425,469.60/638,204.40 = 308,246.40/x
  3. Step 3: Cross multiply
    425,469.60x = 638,204.40 × 308,246.40
  4. Step 4: Simplify right side
    425,469.60x = 196,724,208,764.16
  5. Step 5: Solve for x
    x = 196,724,208,764.16/425,469.60
  6. Step 6: Final answer
    x = 462,369.60

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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.