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Finding the Fourth Proportional to 428,858.56, 591,437.28 and 267,728.48

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Solution

The fourth proportional to 428,858.56, 591,437.28 and 267,728.48 is: 369,223.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,858.56 : 591,437.28 = 267,728.48 : x
  2. Step 2: Convert to fraction form
    428,858.56/591,437.28 = 267,728.48/x
  3. Step 3: Cross multiply
    428,858.56x = 591,437.28 × 267,728.48
  4. Step 4: Simplify right side
    428,858.56x = 158,344,603,989.73
  5. Step 5: Solve for x
    x = 158,344,603,989.73/428,858.56
  6. Step 6: Final answer
    x = 369,223.37

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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.