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Finding the Fourth Proportional to 308,398.11, 462,540.39 and 139,877.88

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Solution

The fourth proportional to 308,398.11, 462,540.39 and 139,877.88 is: 209,791.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,398.11 : 462,540.39 = 139,877.88 : x
  2. Step 2: Convert to fraction form
    308,398.11/462,540.39 = 139,877.88/x
  3. Step 3: Cross multiply
    308,398.11x = 462,540.39 × 139,877.88
  4. Step 4: Simplify right side
    308,398.11x = 64,699,169,167.57
  5. Step 5: Solve for x
    x = 64,699,169,167.57/308,398.11
  6. Step 6: Final answer
    x = 209,791.07

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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.