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Finding the Fourth Proportional to 321,974.40, 483,134.40 and 135,004.80

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Solution

The fourth proportional to 321,974.40, 483,134.40 and 135,004.80 is: 202,579.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,974.40 : 483,134.40 = 135,004.80 : x
  2. Step 2: Convert to fraction form
    321,974.40/483,134.40 = 135,004.80/x
  3. Step 3: Cross multiply
    321,974.40x = 483,134.40 × 135,004.80
  4. Step 4: Simplify right side
    321,974.40x = 65,225,463,045.12
  5. Step 5: Solve for x
    x = 65,225,463,045.12/321,974.40
  6. Step 6: Final answer
    x = 202,579.66

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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.