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Finding the Fourth Proportional to 308,563.83, 462,679.32 and 139,992.18

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Solution

The fourth proportional to 308,563.83, 462,679.32 and 139,992.18 is: 209,912.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,563.83 : 462,679.32 = 139,992.18 : x
  2. Step 2: Convert to fraction form
    308,563.83/462,679.32 = 139,992.18/x
  3. Step 3: Cross multiply
    308,563.83x = 462,679.32 × 139,992.18
  4. Step 4: Simplify right side
    308,563.83x = 64,771,486,859.03
  5. Step 5: Solve for x
    x = 64,771,486,859.03/308,563.83
  6. Step 6: Final answer
    x = 209,912.77

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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.