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Finding the Fourth Proportional to 486,021.70, 729,360.60 and 219,645.10

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Solution

The fourth proportional to 486,021.70, 729,360.60 and 219,645.10 is: 329,615.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,021.70 : 729,360.60 = 219,645.10 : x
  2. Step 2: Convert to fraction form
    486,021.70/729,360.60 = 219,645.10/x
  3. Step 3: Cross multiply
    486,021.70x = 729,360.60 × 219,645.10
  4. Step 4: Simplify right side
    486,021.70x = 160,200,481,923.06
  5. Step 5: Solve for x
    x = 160,200,481,923.06/486,021.70
  6. Step 6: Final answer
    x = 329,615.90

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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.