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Finding the Fourth Proportional to 218,839.20, 328,404.60 and 100,449.60

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Solution

The fourth proportional to 218,839.20, 328,404.60 and 100,449.60 is: 150,741.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,839.20 : 328,404.60 = 100,449.60 : x
  2. Step 2: Convert to fraction form
    218,839.20/328,404.60 = 100,449.60/x
  3. Step 3: Cross multiply
    218,839.20x = 328,404.60 × 100,449.60
  4. Step 4: Simplify right side
    218,839.20x = 32,988,110,708.16
  5. Step 5: Solve for x
    x = 32,988,110,708.16/218,839.20
  6. Step 6: Final answer
    x = 150,741.32

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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.