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Finding the Fourth Proportional to 218,821.20, 305,727.60 and 218,821.20

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Solution

The fourth proportional to 218,821.20, 305,727.60 and 218,821.20 is: 305,727.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,821.20 : 305,727.60 = 218,821.20 : x
  2. Step 2: Convert to fraction form
    218,821.20/305,727.60 = 218,821.20/x
  3. Step 3: Cross multiply
    218,821.20x = 305,727.60 × 218,821.20
  4. Step 4: Simplify right side
    218,821.20x = 66,899,680,305.12
  5. Step 5: Solve for x
    x = 66,899,680,305.12/218,821.20
  6. Step 6: Final answer
    x = 305,727.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.