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Finding the Fourth Proportional to 320,628.30, 480,699.45 and 162,969.90

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Solution

The fourth proportional to 320,628.30, 480,699.45 and 162,969.90 is: 244,331.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,628.30 : 480,699.45 = 162,969.90 : x
  2. Step 2: Convert to fraction form
    320,628.30/480,699.45 = 162,969.90/x
  3. Step 3: Cross multiply
    320,628.30x = 480,699.45 × 162,969.90
  4. Step 4: Simplify right side
    320,628.30x = 78,339,541,296.56
  5. Step 5: Solve for x
    x = 78,339,541,296.56/320,628.30
  6. Step 6: Final answer
    x = 244,331.34

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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.