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Finding the Fourth Proportional to 308,563.35, 462,678.60 and 139,991.70

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Solution

The fourth proportional to 308,563.35, 462,678.60 and 139,991.70 is: 209,912.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,563.35 : 462,678.60 = 139,991.70 : x
  2. Step 2: Convert to fraction form
    308,563.35/462,678.60 = 139,991.70/x
  3. Step 3: Cross multiply
    308,563.35x = 462,678.60 × 139,991.70
  4. Step 4: Simplify right side
    308,563.35x = 64,771,163,767.62
  5. Step 5: Solve for x
    x = 64,771,163,767.62/308,563.35
  6. Step 6: Final answer
    x = 209,912.04

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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.