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Finding the Fourth Proportional to 793,990.80, 1,190,978.28 and 320,669.64

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Solution

The fourth proportional to 793,990.80, 1,190,978.28 and 320,669.64 is: 481,001.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    793,990.80 : 1,190,978.28 = 320,669.64 : x
  2. Step 2: Convert to fraction form
    793,990.80/1,190,978.28 = 320,669.64/x
  3. Step 3: Cross multiply
    793,990.80x = 1,190,978.28 × 320,669.64
  4. Step 4: Simplify right side
    793,990.80x = 381,910,576,295.42
  5. Step 5: Solve for x
    x = 381,910,576,295.42/793,990.80
  6. Step 6: Final answer
    x = 481,001.26

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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.