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Finding the Fourth Proportional to 428,560.74, 591,419.21 and 247,310.28

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Solution

The fourth proportional to 428,560.74, 591,419.21 and 247,310.28 is: 341,291.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,560.74 : 591,419.21 = 247,310.28 : x
  2. Step 2: Convert to fraction form
    428,560.74/591,419.21 = 247,310.28/x
  3. Step 3: Cross multiply
    428,560.74x = 591,419.21 × 247,310.28
  4. Step 4: Simplify right side
    428,560.74x = 146,264,049,185.93
  5. Step 5: Solve for x
    x = 146,264,049,185.93/428,560.74
  6. Step 6: Final answer
    x = 341,291.29

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