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Finding the Fourth Proportional to 412,828.40, 618,659.40 and 305,373.80

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Solution

The fourth proportional to 412,828.40, 618,659.40 and 305,373.80 is: 457,629.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,828.40 : 618,659.40 = 305,373.80 : x
  2. Step 2: Convert to fraction form
    412,828.40/618,659.40 = 305,373.80/x
  3. Step 3: Cross multiply
    412,828.40x = 618,659.40 × 305,373.80
  4. Step 4: Simplify right side
    412,828.40x = 188,922,371,883.72
  5. Step 5: Solve for x
    x = 188,922,371,883.72/412,828.40
  6. Step 6: Final answer
    x = 457,629.30

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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.