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Finding the Fourth Proportional to 324,019.80, 485,786.70 and 166,361.40

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Solution

The fourth proportional to 324,019.80, 485,786.70 and 166,361.40 is: 249,417.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,019.80 : 485,786.70 = 166,361.40 : x
  2. Step 2: Convert to fraction form
    324,019.80/485,786.70 = 166,361.40/x
  3. Step 3: Cross multiply
    324,019.80x = 485,786.70 × 166,361.40
  4. Step 4: Simplify right side
    324,019.80x = 80,816,155,513.38
  5. Step 5: Solve for x
    x = 80,816,155,513.38/324,019.80
  6. Step 6: Final answer
    x = 249,417.34

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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.