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Finding the Fourth Proportional to 216,791.40, 324,749.70 and 145,932.60

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Solution

The fourth proportional to 216,791.40, 324,749.70 and 145,932.60 is: 218,604.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,791.40 : 324,749.70 = 145,932.60 : x
  2. Step 2: Convert to fraction form
    216,791.40/324,749.70 = 145,932.60/x
  3. Step 3: Cross multiply
    216,791.40x = 324,749.70 × 145,932.60
  4. Step 4: Simplify right side
    216,791.40x = 47,391,568,070.22
  5. Step 5: Solve for x
    x = 47,391,568,070.22/216,791.40
  6. Step 6: Final answer
    x = 218,604.47

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1.5x scale

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.