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Finding the Fourth Proportional to 322,469.45, 483,715.10 and 85,812.36

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Solution

The fourth proportional to 322,469.45, 483,715.10 and 85,812.36 is: 128,721.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,469.45 : 483,715.10 = 85,812.36 : x
  2. Step 2: Convert to fraction form
    322,469.45/483,715.10 = 85,812.36/x
  3. Step 3: Cross multiply
    322,469.45x = 483,715.10 × 85,812.36
  4. Step 4: Simplify right side
    322,469.45x = 41,508,734,298.64
  5. Step 5: Solve for x
    x = 41,508,734,298.64/322,469.45
  6. Step 6: Final answer
    x = 128,721.45

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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.