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Finding the Fourth Proportional to 320,979.98, 480,760.31 and 219,537.60

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Solution

The fourth proportional to 320,979.98, 480,760.31 and 219,537.60 is: 328,821.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,979.98 : 480,760.31 = 219,537.60 : x
  2. Step 2: Convert to fraction form
    320,979.98/480,760.31 = 219,537.60/x
  3. Step 3: Cross multiply
    320,979.98x = 480,760.31 × 219,537.60
  4. Step 4: Simplify right side
    320,979.98x = 105,544,963,534.97
  5. Step 5: Solve for x
    x = 105,544,963,534.97/320,979.98
  6. Step 6: Final answer
    x = 328,821.02

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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.