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Finding the Fourth Proportional to 428,847.75, 591,422.45 and 267,717.69

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Solution

The fourth proportional to 428,847.75, 591,422.45 and 267,717.69 is: 369,208.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,847.75 : 591,422.45 = 267,717.69 : x
  2. Step 2: Convert to fraction form
    428,847.75/591,422.45 = 267,717.69/x
  3. Step 3: Cross multiply
    428,847.75x = 591,422.45 × 267,717.69
  4. Step 4: Simplify right side
    428,847.75x = 158,334,250,789.55
  5. Step 5: Solve for x
    x = 158,334,250,789.55/428,847.75
  6. Step 6: Final answer
    x = 369,208.54

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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.