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Finding the Fourth Proportional to 285,809.20, 428,422.20 and 167,419.60

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Solution

The fourth proportional to 285,809.20, 428,422.20 and 167,419.60 is: 250,958.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,809.20 : 428,422.20 = 167,419.60 : x
  2. Step 2: Convert to fraction form
    285,809.20/428,422.20 = 167,419.60/x
  3. Step 3: Cross multiply
    285,809.20x = 428,422.20 × 167,419.60
  4. Step 4: Simplify right side
    285,809.20x = 71,726,273,355.12
  5. Step 5: Solve for x
    x = 71,726,273,355.12/285,809.20
  6. Step 6: Final answer
    x = 250,958.59

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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.