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Finding the Fourth Proportional to 320,685.36, 481,043.53 and 84,028.26

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Solution

The fourth proportional to 320,685.36, 481,043.53 and 84,028.26 is: 126,046.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,685.36 : 481,043.53 = 84,028.26 : x
  2. Step 2: Convert to fraction form
    320,685.36/481,043.53 = 84,028.26/x
  3. Step 3: Cross multiply
    320,685.36x = 481,043.53 × 84,028.26
  4. Step 4: Simplify right side
    320,685.36x = 40,421,252,719.11
  5. Step 5: Solve for x
    x = 40,421,252,719.11/320,685.36
  6. Step 6: Final answer
    x = 126,046.46

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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.