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Finding the Fourth Proportional to 218,922.30, 328,128.30 and 100,605.60

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Solution

The fourth proportional to 218,922.30, 328,128.30 and 100,605.60 is: 150,791.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,922.30 : 328,128.30 = 100,605.60 : x
  2. Step 2: Convert to fraction form
    218,922.30/328,128.30 = 100,605.60/x
  3. Step 3: Cross multiply
    218,922.30x = 328,128.30 × 100,605.60
  4. Step 4: Simplify right side
    218,922.30x = 33,011,544,498.48
  5. Step 5: Solve for x
    x = 33,011,544,498.48/218,922.30
  6. Step 6: Final answer
    x = 150,791.15

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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.