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Finding the Fourth Proportional to 307,647.81, 424,553.16 and 171,680.28

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Solution

The fourth proportional to 307,647.81, 424,553.16 and 171,680.28 is: 236,918.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,647.81 : 424,553.16 = 171,680.28 : x
  2. Step 2: Convert to fraction form
    307,647.81/424,553.16 = 171,680.28/x
  3. Step 3: Cross multiply
    307,647.81x = 424,553.16 × 171,680.28
  4. Step 4: Simplify right side
    307,647.81x = 72,887,405,383.68
  5. Step 5: Solve for x
    x = 72,887,405,383.68/307,647.81
  6. Step 6: Final answer
    x = 236,918.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.