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Finding the Fourth Proportional to 220,482.64, 303,984.48 and 142,821.28

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Solution

The fourth proportional to 220,482.64, 303,984.48 and 142,821.28 is: 196,910.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,482.64 : 303,984.48 = 142,821.28 : x
  2. Step 2: Convert to fraction form
    220,482.64/303,984.48 = 142,821.28/x
  3. Step 3: Cross multiply
    220,482.64x = 303,984.48 × 142,821.28
  4. Step 4: Simplify right side
    220,482.64x = 43,415,452,533.73
  5. Step 5: Solve for x
    x = 43,415,452,533.73/220,482.64
  6. Step 6: Final answer
    x = 196,910.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.